Answers
2: c
Step-by-step explanation:
3: a
by Supplementing each answer Into the equation
Step-by-step explanation:
what don't you understand about this ? did you never solve 2 equations with 2 variables ?
it is really easy. there are 2 main approaches :
1. substitution. you use one of the two equations to express one variable by an expression purely in the other variable. then you use that in the other equation (resulting in one equation with one variable) and solve it. with that result you go back to the other equation and calculate the other variable.
2. equation arithmetic. when the terms of at least one of the variables are similar in both equations, you can multiply (if needed) one or both equations (left and right side !) by a fitting number and then add it subtract one equation from the other, so that you are left with one equation in one variable, which you solve. with that result you go back to any of the original equations and calculate the other variable.
there would be a third option for questions like this :
3. trial and error. simply put the point coordinates as x and y into both equations, and see for what point(s) both remain true.
but in order to show you the methodical approaches, we will use substitution for question 2 and equation arithmetic for question 3.
2)
2x + y = 5
-x + 2y = 5
I use the first equation to transform. and I get
y = 5 - 2x
with that I go into the second equation :
-x + 2(5 - 2x) = 5
-x + 10 - 4x = 5
-5x = -5
x = 1
and with that I get
y = 5 - 2×1 = 5 - 2 = 3
so, C (1, 3) is the right answer.
3)
2x + y = 7
-x + y = 1
let's subtract the second equation from the first :
2x + y = 7
- -x + y = 1
------------------
3x + 0 = 6
3x = 6
x = 2
with that I go into one of the original equations :
-2 + y = 1
y = 3
so, A (2, 3) is the right answer.
Related Questions
IM GIVING OUT BRIANLIEST
Answers
Answer:
3.78
Step-by-step explanation:
2x+4 over 3 - 5x-7 over 2 = 5 solve the equation
Answers
Answer:
x = -1/11.
Step-by-step explanation:
I am interpreting this as:
(2x+4)/ 3 - (5x-7)/2 = 5
Multiply through by the LCM of 2 and 3 ( that is 6):
2(2x + 4) - 3(5x - 7) = 30
4x - 15x + 8 +21 = 30
-11x = 30 - 21 - 8
-11x = 1
x = -1/11.
Work out the mean of √50, √18 and √8.
Give your answer in the form of a√2.
Show full working out.
Thank you!! <3
Answers
[tex]\frac{\sqrt{50}+\sqrt{18}+\sqrt{8}}{3} = \frac{10}{3} . \sqrt{2}[/tex]
ok done. Thank to me :>
The graph of f(x) = 2x is shown on the grid.
On a coordinate plane, an exponential function approaches y = 0 in quadrant 2 and increases into quadrant 1. It goes through points (0, 1), (1, 2), (2, 4).
The graph of g(x) = (One-half)x is the graph of f(x) = 2x reflected over the y-axis. Which graph represents g(x)?
On a coordinate plane, an exponential function approaches x = 0 in quadrant 4 and increases into quadrant 1.
On a coordinate plane, an exponential function decreases from quadrant 2 into quadrant 1 and approaches y = 0.
On a coordinate plane, an exponential function approaches y = 0 in quadrant 3 and curves down into quadrant 4.
On a coordinate plane, an exponential function approaches x = 0 in quadrant 1 and curves down and to the right into quadrant 4.
Answers
Answer:
Your answer would be the second option.
Explanation:
As it is looking for an exponential decay function, you must find one. As an exponential function has to be sloping negatively, you must find the graph that does just this. The only graph that does is graph number two. Henceforth your answer is graph number two, or B. (I also did this quiz, and got a 100%)
Hope This Helps!
The graph represents g(x) is B) On a coordinate plane, an exponential function decreases from quadrant 2 into quadrant 1 and approaches y = 0.
What is exponential growth or decay function?Consider the function:
[tex]y = a(1\pm r)^m[/tex]
where m is the number of times this growth/decay occurs, a = initial amount, and r = fraction by which this growth/decay occurs.
If there is negative sign, then there is exponential decay happening by r fraction or 100r %
The graph of f(x) = 2x is shown.
it is looking for an exponential decay function, As an exponential function has to be sloping negatively.
Draw the graph of the equation by using the table shown below:
x f(x)
-2 -4
-1 -2
0 0
The graph the exponential function approaches y = 0 in quadrant 1.
The function increases into quadrant 2 and It crosses the y-axis at (0, 1).
Hence, the correct option is B) On a coordinate plane, an exponential function decreases from quadrant 2 into quadrant 1 and approaches y = 0.
Learn more about exponential growth and decay here:
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4t=-10
the operation would be multiply and i got the answer which is 2.5
i just don’t know if it’s an inverse or a reciprocal.
can anyone help? thanks !
Answers
~one variable linear equation
4t = -10
t = -10 ÷ 4
t = -2,5 ✔️
So, the answer is -2,5 no 2,5
~ nice to help you ^^
if 8 boxes contain 480 pins how many pin will there be in 3 boxes
Answers
Answer:
180
Step-by-step explanation:
find the value of x.
Answers
Answer:
x = 11
Step-by-step explanation:
Chords equidistant from the centre , which is the case here are congruent, so
x = 11
2
For the following Arithmetic Sequence, find the explicit form, and then find a 40
11, 1,-9, -19, ...
a40 =
an=
Answers
Answer:
see explanation
Step-by-step explanation:
The explicit formula for an arithmetic sequence is
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 11 and d = a₂ - a₁ = 1 - 11 = - 10 , then
[tex]a_{n}[/tex] = 11 - 10(n - 1) = 11 - 10n + 10 = 21 - 10n ← explicit formula
Using the explicit formula to find a₄₀ , then
a₄₀ = 21 - 10(40) = 21 - 400 = - 379
I don’t know what to call it but I need help
Answers
Answer: this is a math test, i presume
on schoology
Can-25 be expressed as a ratio in the form?
Yes
No
Answers
Answer:
-25 can be expressed as a ratio of -50/2, -75/3, etc
Step-by-step explanation:
Answer:
yes
Step-by-step explanation:
Which direction does the decimal point move in when you divide by powers of 10 greater than 0?
Answers
Answer:
the left side is the answer
SIMPLIFY THESE!! I WILL MARK U BRAINLIEST!!
Answers
Answer:
see explanation
Step-by-step explanation:
Using the rules of exponents
[tex]a^{m}[/tex] × [tex]a^{n}[/tex] = [tex]a^{(m+n)}[/tex]
[tex]a^{m}[/tex] ÷ [tex]a^{n}[/tex] = [tex]a^{(m-n)}[/tex]
(a)
[tex]4^{9}[/tex] × 4³ = [tex]4^{(9+3)}[/tex] = [tex]4^{12}[/tex]
(b)
[tex]6^{5}[/tex] × 6² = [tex]6^{(5+2)}[/tex] = [tex]6^{7}[/tex]
(c)
[tex]8^{6}[/tex] ÷ 8 = [tex]8^{(6-1)}[/tex] = [tex]8^{5}[/tex]
(d)
[tex]7^{8}[/tex] ÷ [tex]7^{6}[/tex] = [tex]7^{(8-6)}[/tex] = 7²
please help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee (thank you :)
(cAt)
Answers
Answer:
answer is 2
Step-by-step explanation:
funny pic
Help mE ASAPPPPPPPP PLSSSSS
Answers
Answer:
I think its
B) CG
I hope its right
-4/4 plus 160 percent plus 1/5
Answers
Answer:
-1 + (1.6) + 0.2
Step-by-step explanation:
-1 + 1.6 = 0.2 = 0.8
Answer:
-1 + (1.6) + 0.2
Step-by-step explanation:
-1 + 1.6 = 0.2 = 0.8
Solve the equations. 81^x^2=27^x
Answers
Answer: 81ײ=27× x = 6
solve for x:2a+5=11
Answers
[tex]2a + 5 = 11 \\ = > 2a = 11 - 5 \\ = > 2a = 6 \\ = > a = \frac{6}{2} \\ = > a = 3[/tex]
Answer:a = 3
Hope it helps.
Do comment if you have any query.
The solution to the system of equations 2x+3y=18 -9y+z=-23 is (A,B,C) find the 5x-4z=50 values of A,B,and C
Answers
Answer:
6 = A, 2 = B, -5 = C
Step-by-step explanation:
Univariate statistical tests are most appropriate for testing hypotheses that compare the characteristics of two groups. Group startsTrue or False
Answers
Univariate statistical tests are most appropriate for testing hypotheses that compare the characteristics of two groups is False
Univariate statistical tests are statistical test that are used to observe a single variable. We can have one or more independent variables but we study only one dependent variable.
So, univariate statistical tests are not most appropriate for testing hypotheses that compare the characteristics of two groups.
So, Univariate statistical tests are most appropriate for testing hypotheses that compare the characteristics of two groups is False
Learn more about univariate statistical tests here:
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What is the coefficient of the term 5/3 xy?
A. 5xy
B. 5/3
C. 5
D. 1/3
Answers
is 6,8,9 a pythagorem theorem? pls help me due rn
Answers
Answer:
No, it isn't.
Step-by-step explanation:
Pythagorean theorem is x^2 + y^2 = z^2.
6^2 + 8^2 = 9^2
36 + 64 = 81
100 = 81
So, it isn't.
Answer:
No.
Step-by-step explanation:
36+64 does not equal 9² (81)
A boat is carrying containers that weigh 2000 pounds each.
Use this information to fill in the table. Then plot the ordered pairs given by the table.
2 Weight?
4. Weight?
9. Weight?
Answers
Answer:
Write seven and twelve hundredths in standard form.
Step-by-step explanat
please calculate the area for this triangle
Answers
Answer:
30
Step-by-step explanation:
Suppose that $2000 is placed in an account that pays 2% interest compounded each year. Assume that no withdrawals are made from the account.
Answers
The amount in the account after 1 year is $2,040.00
The amount in the account after 2 years is $2,080.80
What is future value of a single cash flow?
The future value of a single cash flow like the $2,000 is the future equivalent worth of the initial amount when interest earned is added to it.
The future value in this case can be determined as shown thus:
FV=PV*(1+r)^N
FV=unknown future value
PV=initial investment=$2000
r=interest rate=2%
N=years of investment , 1 and 2 years respectively
FV after one year:
FV=$2000*(1+2%)^1
FV=$2,040.00
FV after two years:
FV=$2000*(1+2%)^2
FV=$2,080.80
Find out more about future value on:https://brainly.com/question/25545513
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Full question:
Suppose that $2000 is placed in an account that pays 2 % interest compounded each year. Assume that no withdrawals are made from the account.
Find the amount after one year. Find the amount after two years
The answer please it’s from khan academy
Answers
Answer:
Step-by-step explanation:
Before removing brackets, multiply everything inside them by two.
2*1/5 m - 2 * 2/5 + 3/5
2/5 m - 4/5 + 3/5
2/5 m - 1/5
That's as much as you can do. No further reduction is possible.
Answer:
[tex]\frac{2m-1}{5}[/tex]
Step-by-step explanation:
[tex]2(\frac{1}{5} m-\frac{2}{5} )+\frac{3}{5}[/tex]
First, simplify [tex]\frac{1}{5} m[/tex] to [tex]\frac{m}{5}[/tex]:
[tex]2(\frac{m}{5} -\frac{2}{5} )+\frac{3}{5}[/tex]
Merge the denominators:
[tex]2(\frac{m-2}{5} )+\frac{3}{5}[/tex]
Simplify:
[tex]\frac{2m-4}{5} +\frac{3}{5}[/tex]
Merge the denominators again:
[tex]\frac{2m-4+3}{5}[/tex]
Simplify one final time:
[tex]\frac{2m-1}{5}[/tex]
Please mark brainliest if this helps you, and I can provide more information if needed.
PLEASE HELP FAST; What is (7 · 5 · 2 / 7 · 3)^2 x (5^0 / 2^-3)^3 x 2^-9?
-10/9
20/3
-100/9
-700/3
Answers
Answer:
I think it's 900
Step-by-step explanation:
Simplify 2y+4x=16x +6y
Answers
Pls help me
Question 8 (5 points)
(03.05 LC)
What is the volume of a cylinder (in cubic inches) with a radius of 6 inches and a height of 3 inches?
Use 3.14 for n. Round your answer to the nearest hundredth. (5 points)
a
339.12 cubic inches
b
56.52 cubic inches
с
100.48 cubic inches
d
113.04 cubic inches
Question 9 (5 points)
Answers
The correct answer according to a cylinder calculator would be 339.29 cubic inches but the closest answer you have would be 339.12 cubic inches
What is the value of p?
p + 2 - 4= 14
Drag and drop the correct answer in the box.
Answers
p - 2 = 14
p = 14 + 2
p = 16
Answer:
p = 16
Step-by-step explanation:
(p + 2) - 4 = 14
We can just drop the parentheses:_
p + 2 - 4 = 14
p - 2 = 14
Add 2 to both sides:-
p - 2 + 2 = 14 + 2
p = 16
test the following statements to see if it’s reversible if so choose the true biconditional
Answers
Answer:
the statement is not reversible
Step-by-step explanation:
Hi there!
We are given the statement "if x=3, then x²=9"
In this case, the hypothesis (p) is x=3, while the conclusion (q) is x²=9
Reversing the statement would make it so that q is first, then p is after.
In other words, if the statement was originally "if p, then q", then the reverse of that statement would be "if q, then p"
This is known as the CONVERSE of the statement. Sometimes, the converse is true, but not always. If both the statement and the converse are true, then it's known as a BICONDITIONAL, where it works both ways
So we'll need to test if the following statement "if x²=9, then x=3" is true
If you subtract 9 from both sides, x²=9 becomes this equation:
x²-9=0
Using the square of differences formula, where x is a and 3 (square root of 9) is b:
(x-3)(x+3)=0
Now using zero product property:
x-3=0
Add 3 to both sides
x=3
AND:
x+3=0
Subtract 3 from both sides
x=-3
We see that the answers from this equation are x=3 and x=-3.
*if you plug 3 and -3 back in the equation, we can see they both work. Remember that x² is equal to x*x, or (x)²:
If x=3:
(3)²=9
(3)(3)=9
9=9
If x=-3:
(-3)²=9
(-3)(-3)=9
9=9
Hence, the statement doesn't work in the converse
The option "the statement is not reversible" is not the answer.
Hope this helps!