Answer:
b. better; high
Step-by-step explanation:
Review the proof of the identity cos(π − A) = −cosA.
cos(π − A)
Step 1: = cosπcosA − sinAsinπ
Step 2: = (−1)(cosA) + (sinA)(0)
Step 3: = −1cosA + (sinA)(0)
Step 4: = −cosA + 0
Step 5: = −cosA
At which step was an error made?
step 1
step 2
step 3
step 4
Answer:
error in step 1
Step-by-step explanation:
well where is does the step not make sense?
remember cos(pi) = -1 and sin(pi)=0
that means step 1 is strange... it didn't distribute properly
it should have been:
cos(pi) - cos(A)
hope that helps! ^-^
The error is made at step 1). The correct trigonometric identity is cos(π - A) = cosπcosA + sinπsinA.
What are trigonometric identities?Trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined.
cos(π - A) = cosπcosA + sinπsinA
Learn more about trigonometric identities here
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Simplify the expression.
7(a + 3b) + 2(a - b)
A.18a + 18b
B.9a + 23b
C.9(2a + 2b)
D.9a + 19b
Answer:
D.9a+19b
Step-by-step explanation:
7(a+3b)+2(a-b)
7*a=7a
7*3b=21b
2*a=2a
2*-b=-2b
7a+21b+2a-2b
7a+2a=9a
21b-2b=19b
Hope this helps:)
if it is a tree then it has leaves which of the diagrams below represents the statement
Answer: B
Step-by-step explanation:
In FGH, mF = 60, mG = 68, and mH = 52. Which side of FGH is the shortest? Pls help
Answer
FG
This is the answer that I got (apex)
Answer:
FG
Step-by-step explanation:
AP3X
pog
-6 ÷ -2 pls provide an explanation
Answer:
it would be 3 because a negative divided by negative is a positive
and 6/2=3
Chloe went on vacation with her family and they decided to swim with the dolphins there's a flat fee of $75 for the family to rent wet suits additionally a cost an extra $189.99 per person to swim with the dolphins the families total cost was $1024.99 how many family members went swimming with the dolphins
Answer:
5 family members went swimming with the dolphins.
Step-by-step explanation:
From the information given, you can say that the total cost for the family to swim with dolphins is equal to the flat fee for the family to rent wet suits plus the extra cost per person for the number of family members:
1024.99=75+189.99x, where x is the number of family members
Now, you can solve for x:
1024.99-75=189.99x
949.99=189.99x
x=949.99/189.99
x=5
According to this, the answer is that 5 family members went swimming with the dolphins.
Choose the answer that makes the sentence blank true real numbers are integers
i don't think any one can answer this and you be more specific
if m2 = 125, m12= 37 and m18 = 102, find the measure of each angle
Answer/Step-by-step explanation:
Given:
m<2 = 125°
m<12 = 37°
m<18 = 102°
a. m<1 + m<2 = 180° (linear pair)
m<1 + 125° = 180° (substitution)
m<1 = 180° - 125°
m<1 = 55°
b. m<3 = m<18 (alternate exterior angles)
m<3 = 102° (substitution)
c. m<4 + m<3 = 180° (linear pair)
m<4 + 102° = 180° (substitution)
m<4 = 180° - 102°
m<4 = 78°
d. m<5 = m<2 (vertical angles)
m<5 = 125° (substitution)
e. m<6 = m<1 (vertical angles)
m<6 = 55° (substitution)
f. m<7 = m<12 (alternate angles)
m<7 = 37° (substitution)
g. m<8 + m<12 + m<13 = 180° (sum of triangle)
m<12 = 37° (given)
m<13 = m<18 = 102° (vertical angles)
m<8 + 37° + 102° = 180° (substitution)
m<8 + 139° = 180°
m<8 = 180° - 139°
m<8 = 41°
h. m<9 = m<18 (corresponding angles)
m<19 = 102° (substitution)
i. m<10 = m<6 (alternate interior angles)
m<10 = 55°
j. m<11 + m<6 + m<7 = 180° (sum of triangle)
m<11 + 55° + 37° = 180° (substitution)
m<11 + 92° = 180°
m<11 = 180° - 92°
m<11 = 88°
k. m<13 = m<18 (vertical angles)
m<13 = 102°
l. m<14 = m<4 (corresponding angles)
m<14 = 78°
m. m<15 = m<5 (corresponding angles)
m<15 = 125°
n. m<16 = m<6 (corresponding angles)
m<16 = 55°
o. m<17 = m<14 (vertical angles)
m<17 = 78°
what is 8+[4+(-9)] ?
Answer:
Positive 3
Step-by-step explanation:
you have to add 4 and -9 first and you get -5 then you add that to positive 8 and get 3
What's the answer for this question
Answer: x-3
Step-by-step explanation: RT - TS = RS
What is f(5) for the function f(x) = 7x +4?
f(5)=
Answer:
f(5) = 39
Step-by-step explanation:
An adult blue whale can eat about 40,000,000 krill a day. Write this number in scientific notation.
Answer:
4 x 10^7
Step-by-step explanation:
1 x 10^7 is 10 million, just multiply that 1 by 4 to get your answer
Answer:
4 x 10^7
Step-by-step explanation:
there are 4 swimmers. amy swam 2 more laps than sean. katie swam twice as many laps as sean. tom swam 4 more laps than katie. all together the 4 swimmers swam a total of 78 laps. how many laps did sean swim?
Answer:
Sean swam 12 laps.
Step-by-step explanation:
Let S represent Sean
Let S+2 represent Amy
Let 2S represent Katie
Let 2S + 4 represent Tom
Now add together and set it equal to 78
S + S+2 + 2S + 2S+4 = 78
6S + 6= 78
6S=72
S=12
how do you do -5+-9
Answer:
-14
Step-by-step explanation:
adding 2 negatives gives you a negative
Please help me someone
Answer:
The lift is safe to use.
Step-by-step explanation:
565-88 is 477. The life is safe when the weight is 480 or less.
f (x) = 72 – 5, x < 0
2,
0 <<3
✓+1,
What are the indicated limits of f(x)
Answer: limits of f(36
Step-by-step explanation:
Round 35.367 to the nearest tenth.
Step-by-step explanation:
35.4
Answer:
35.4
Step-by-step explanation:
To round 35.367 to the nearest tenth consider the hundredths’ value of 35.367, which is 6 and equal or more than 5. Therefore, the tenths value of 35.367 increases by 1 to 4.
35.367 rounded to the nearest tenth = 35.4
In a period of 2 and one-fourth hours, 5 and one-half gallons of water leaked from a water tank. How much water did the tank lose per hour?
Which division problem represents the problem?
Answer:
-11/2 divided by 9/4
Answer:
-11/2 divided by 9/4
Step-by-step explanation:
This is the answer I got
Kenya picked 18 flowers from her garden. If 3/5 of flowers in her garden remain unpicked, how many flowers are still in her garden?
Answer:
45
Step-by-step explanation:
picking 18 flowers = 2/5 of garden or 40%
18÷.4=45
A box of chocolates contained 8% caramels. There were 4 caramels in the box. How many pieces of chocolate are in the box?
Answer:
Step-by-step explanation:
If you are desperate, copy and paste the below answer. It should be correct but I don't know your syllabus.
8% C = 4 1% C = 4 ÷ 8 =0.5 100% C = 0.5 × 100 = 50
Hope this helps.
( -4 ) 3÷( -4 ) -12
Answer:
(-4)3/(-4)-12
-12/48
-1/4
Step-by-step explanation:
PEMDAS
do multiplication then division
If the m<7 = 38 degrees and m<10 = 102 degrees, find each
measures.
m 1 =
degrees
m<2 =
degrees
m<3 =
degrees
m<4 =
degrees
m<5 =
degrees
m<6 =
degrees
m<8 =
degrees
m<9 =
degrees
m<11 =
degrees
m<12 =
degrees
m<13 =
degrees
m<14 =
degrees
m<15 =
degrees
m<16 =
degrees
Step-by-step explanation:
please show the polygon of figure that is supposed to be found the angles on
The other answer was right
write the sentence as an inequality
a number m is more than -7 2/3 or at most -10
See attachment for math work and answer.
The given statement in the form of inequality can be written as,[tex]-7 \dfrac{2}{3} \leq m \leq -10[/tex]
What is inequality?It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than known as inequality.
It is given that,
A number m is more than -7(2/3) or at most -10
From the given data it is observed that the value of the number lies between -7(2/3) and -10.\
The given data can be written in the terms of inequality as,
[tex]-7 \dfrac{2}{3} \leq m \leq -10[/tex]
Thus, the given statement in the form of inequality can be written as,[tex]-7 \dfrac{2}{3} \leq m \leq -10[/tex]
Learn more about inequality here:
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steps to solve 6-3y=-6
Answer:
y = -4
Step-by-step explanation:
6 - 3y = 6
now were going to get the variable and the numbers on different sides
6 - 3y - 6 = - 3y
6 + 6 = 12
now divide each side by -3
-3y / -3 = y
12 / -3 = -4
y = -4
Plz help! Is this right? Question is below!
Solve the equation
1/2n+2(2n-1)=1/2n+4n
Answer:
9n/2 -2
Step-by-step explanation:
Quick!!!!
Find the mean of this data set: 593, 580, 544, 434, 420, 398, 390, 375
A.427
B.420
C.564
D.394
Answer:
nonono its 420
Step-by-step explanation:
420 666 6969
HELP ASAP PLEASE ! Which graph represents the equation Y=-3/2x-3 .. answer choices are in the pic
Answer:
The third ,bottom left.
Step-by-step explanation:
The y goes -3 below the line and -3/2 which means it goes to the right of the graph.
The Points are (-2,0),(0,-3)
Logan went shopping at the mall. He spent $75.43 on shoes, $25.14 for a t‐shirt, and $43.85 on a denim jacket. How much did he spend in all? If Logan paid the cashier $200 in cash, how much money will he get back? *
Answer:
He spent 144.42 and he got back 55.58
Step-by-step explanation:
can you please solve this
Answer:
D
Step-by-step explanation:
9pi is 28.27 which is greater than 27.