You had 90 books on your shelf. You decided to donate 20%. How many books were donated? How many do you have left?

1. 30 donated and 88 left
2. 24 donated and 72 left
3. 18 donated and 64 left
4. 18 donated and 72 left​

Answers

Answer 1
The answer is the forth option
Answer 2
4. 18 donated and 72 left
20% of 90= 18
80% of 90=72
———————-
100% of 90=90

Related Questions

Simplify ratio
1. 65:15
2. 56:45
3. 98:24
4. 380:56
5. 246:39
6. 98:112
7. 54:12
8. 87:15
9. 47:17
10. 90:117

Answers

1) 13:3

2) Same

3) 49:12

4) 95:14

5) 82:13

6) 7:8

7) 9:2

8) 29:5

9) Same

10) 10:13

Your basically dividing them by each other on a calculator

E.g. 90 ÷117 = 10/13

(10:13)

Or

20:30

20÷30=2/3

(2:3)

So, you could find the HCF of both numbers.

( highest factor of 20 & 30 is 10)

Hope this helps!

Jim’s mom ordered 9 pizzas for his party. If each person eats 1/3 of a pizza, how many people can eat pizza at Jim’s party?

Answers

Answer:

27 people can eat pizza at Jim's Party

Step-by-step explanation:

If you divided each pizza by 3, 3 people a pizza right, so 3 x 9 would get you the number of people that can eat pizza at the party, hope this helps! :D

Is x greater than less than or equal to 46 degree

Answers

Can we have a picture please?

Find the perimeter of each figure in feet, 48 in 3yd 5ft 1yd .

Answers

Answer:

Step-by-step explanation:

Remark

First of all, all the units must be the same. Inches is probably the best unit to use.

Second the base line at the bottom must be completed. How long is it

Givens

Left side = 48 inches

Top = 3 yards

1 yard is 36 inches.3 yard is 3* 36 = 108 inches.

Right side = 5 feet.

1 foot = 12 inches5 feet = 12 * 5 = 60 inches

Bottom = 1 yard + top

Bottom = 1 yard + 3 yards

Bottom = 4 yards

1 yard = 36 inches4 yards  = 144 inches

Perimeter = 144 + 60 + 108 + 48

Perimeter = 360 Inches.

Answer

Perimeter = 360 inches

Perimeter = 360 / 12 = 30 feet     There are 12 inches in a foot

Perimeter = 360 / 36 = 10 yards.  There are 36 inches in a yard

The question does not specify the units. Probably inches would work, but if a computer is marking your answer and you get it wrong, you are going to have to try the other two answers in turn.

A circle has exactly four lines of symmetry.

True
Or
False

Answers

Answer:

no false it has infinite

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
10 ft
2 ft
2 ft
20 ft
What is the area of the kite?

Answers

Answer:

60ft^2

Step-by-step explanation:

area= 1/2(b)(h)

b for both traingles is 4

height of 1 triangle is 10 and the other is 20

total are will equal both triangles added together

area of first triangle = 1/2(10)(4)= 20ft^2

area of second triangle = 1/2(20)(4)= 40ft^2

area of the kite= 20+40= 60ft^2

HELP NO HURRY TAKE YO TIME FOR MY SISTERRR

Answers

Answer:

make me brainliest plsssssssss

Step-by-step explanation:

A

Evaluate the expression if x=2, y=7, and z = -4

(z - x) + y​

Answers

Answer:

1

Step-by-step explanation:

Evaluate (z - x) + y​ if x = 2, y = 7, and z = -4

(z - x) + y​ <== substitute the numbers for the variables

(-4 - 2) + 7

-6 + 7 <== add

1

Hope this helps!

2. Draw what might be the missing figure in
the pattern below.

Answers

Answer:

Please also attach the figure or the pattern like this.

Bud is a teacher in the science, technology, engineering, and mathematics career cluster. he is thinking about changing his career as he does nto see much growth in teaching. he is thinking of moving into private industry. why might this be a good move for bud? he can return to a university or community college and train for a new career. he can return to doing what he loves, even if there are more regulations. he can return to a career that is expected to grow faster than most industries. he can return to doing what he loves, even though he will earn less money.

Answers

Answer:

C He can return to a career that is expected to grow faster than most industries.

Step-by-step explanation:

Answer:

It's C, Not Capping

Step-by-step explanation:

Got 100% On The Unit Test Review :)

What is the approximate value for
683/22
A. 20
B. 21
C. 25
D. 31

Answers

The answer is D, or 31

D. 31                                            ( roundest to the nearest whole number)

[tex]\dashrightarrow \ \sf \dfrac{683}{22}[/tex]

[tex]\dashrightarrow \ \sf 31\dfrac{1}{22}[/tex]

[tex]\sf \dashrightarrow \ 31.04545[/tex]

whole number: 31remainder: 1divisor: 22

How can you decompose the composite figure to determine its area? as three triangles and a circle as two triangles, a rectangle, and a circle as a triangle, a pentagon, and a semicircle as a triangle, a rectangle, and a semicircle

Answers

We can decompose the composite figure into a triangle, a rectangle, and a semicircle in order to find the area of the composite figure.

What is the area?

The space filled by a flat form or the surface of an item is known as the area.

The number of unit squares that cover the surface of a closed-form is the figure's area. Square centimeters and other similar units are used to measure area.

The area of the composite figure is equal to the sum of area 1, area 2, and area 3

Area 1 - triangle

Area 2 - rectangle

Area 3  - semicircle

We can decompose the composite figure into a triangle, a rectangle, and a semicircle in order to find the area of the composite figure.

Hence option d is correct.

To learn more about the area refer to the link;

https://brainly.com/question/11952845

Answer:

option D

Step-by-step explanation:

Is the pair of angles supplementary 81 ° and 9 °

Yes or No?

Answers

Answer:

No, They are complementary

Step-by-step explanation:

Supplementary is when the angles add up to 180 degrees.

Complementary is when the angles add up to 90 degrees.

Answer:

No it isn’t a supplementary angle because supplementary angles add up to 180 degrees. 81+9=90

Step-by-step explanation:

A 40-pound case of bananas costs $23.60. How much would a 70-pound case cost?

Answers

Answer:

$41.30

Step-by-step explanation:

First, divide 23.60 by 40

23.60/40 = 0.59

0.59 is the unit price, (or the worth of one {1} pound case)

0.59 * 70 = 41.3

$41.30 is the cost of a 70-pound case of bananas

hope this helps :)

PLease help me
I will give a maybe brainly and
a thanks and 3 - 5 stars
PLEASE PLEASE

Answers

Answer:

The blank would be 2.

Step-by-step explanation:

Step 1. Notice that a equals 2.
Step 2. See that 7a means 7 x a
Step 3. See that theblank equals 7x2
Step 4. Get the answer of 14 (if needed)
I hope this helps! :)

Answer:

You would put 2 in the little box

Step-by-step explanation:

When there is a letter right next to a number, you are multiplying. The expression would be 7x2 giving you the answer of 14

Hope this helped!

In the given circle with the centre O,
angle ABC = 100° angleACD = 40° and CT is a tangent to the circle at C. Find Angle ADC and Angle DCT.

Answers

∠ADC = 80° and ∠DCT = 60°

Step-by-step explanation:

As the points A, B, C and D lie on a circle, So, ABCD is a cyclic quadrilateral...

As, Sum of opp. ∠s in a cyclic quadrilateral = 180°

∴ ∠ADC + ∠ABC = 180°

=> ∠ADC + 100° = 180° => ∠ADC = 80°

Now,

Sum, of all angles in a traingle = 180°

In ΔACD, ∠CAD + ∠ADC + ∠ACD = 180°

=> ∠CAD + 80° + 40° = 180°

=> ∠CAD = 180° - 80° - 40° = 60°

As CT is tangent to the circle at the point C and CD is a chord of the circle, So

∠DCT = ∠CAD........(∠s in alternate segments are equal,,So ∠CAD = 60°)

=> ∠DCT = 60°

Hope it helps you!!

Answer:

See below ~

Step-by-step explanation:

∠ADC

∠ABC + ∠ADC = 180° (Angles in a cyclic quadrilateral)∠ADC = 180° - 100° = 80°

∠DCT

∠DCT = ∠CAD (ANGLES IN ALTERNATE SEGMENTS EQUAL)∠CAD = 180° - 80° - 40° = 60°∠DCT = 60°

Susu is solving the quadratic equation 4x2-8x-13=0 by completing the square. her first four steps are shown in the table. a table listing the first few steps in deriving the quadratic formula in which step did susu first make an error? step 1 step 2 step 3 step 4

Answers

The error is in step 2 in step 2 Susu forgot to divide 8 by 4 for finding the solution of a quadratic equation.

What is a quadratic equation?

The name Quadratic comes from "quad" meaning square, because the variable gets squared (like x2). It is also called an "Equation of Degree 2"

Susu is solving the quadratic equation [tex]4x^2-8x-13=0[/tex] by completing the square

To apply to completing the square method we need to get x^2 alone

Susu added 13 on both sides. So step 1 is correct

When we factor out 4, we divide both terms by 4

[tex]4(\dfrac{4x^2}{4}-\dfrac{8x}{2})=13[/tex]

[tex]4(x^2-2x)=13[/tex]

Susu forgot to divide 8 by 4

So , error in step 2

To know more about quadratic equation follow

https://brainly.com/question/1214333

Answer:

Step-by-step explanation:

2

PLEASE HELP MEEEEE!!!!!

Answers

Answer:

d= 50m

Step-by-step explanation:

I used the Pythagorean Theorem to solve this.

30^2+ 40^2= x^2

900+1600=x^2

2500=x^2  

x=50

74. The mean of 50 test scores was calculated as 88.
But, it turned out that one of the scores was
misread at 94 but it was 69. What is the mean?
85
87
87.5
88.5

Answers

The mean if the scores was misread at 94 but it was 69 is 87.5

How to find the mean of a number?

Mean is also known as average. It is mathematically represented as:

Mean  = Sum of data/Sample space

Given the following parameters

Mean = 88

Sample size = 50

Substitute

88 = Sum/50

Sum = 88(50)

Sum = 4400

If one of the scores was misread at 94 but it was 69, hence;

Sum + (94-69) = 4400
Sum + 25 = 4400
Sum = 4400 - 25
Sum = 4331
New mean = 4375/50
New mean = 87.5

Hence the mean if the scores was misread at 94 but it was 69 is 87.5

Learn more on mean here: https://brainly.com/question/1136789

Suppose a population contains 20,000 people. All else being equal, a study
based on a population sample that includes which of the following numbers
of respondents would you have the most confidence in?

A. 200
B. 2000
C. 20
D. 2

Answers

Answer:

2000

Step-by-step explanation:

larger sample sizes have more reliable results

Which of the following produces the loudest sound?

Answers

i belive it’s c !! have a good day

please teach me how to do this

Answers

Check the picture below.

[tex]\cfrac{18}{18+x}~~ = ~~\cfrac{19.2}{38.4}\implies \cfrac{18}{18+x}~~ = ~~\cfrac{19.2}{2(19.2)}\implies \cfrac{18}{18+x}~~ = ~~\cfrac{1}{2} \\\\\\ 36=18+x\implies 18=x[/tex]

Compare using >, <, or=.
3 miles
5,000 yards

Answers

Answer:

3 miles > 5,000

Step-by-step explanation:

hope this helps :)

have a great day or night.

pls brainliest first to answer.

What is .006 as a percent

Answers

Answer:

.006 as a percentage is .6%

Step-by-step explanation:

Multiply your number by 100 to get the percentage.

.006 x 100 = .6

Therefore, your answer is .6%.

.006 as a percent is 0.6

i do not know this answer

Answers

Answer:

Move all terms that don't contain x to the right side and solve. x = 10 − 2 y

Step-by-step explanation:

Jessica is standing 2 miles from the center of the
base of Pikes Peak and looking at the summit of the
mountain, which is 1.4 miles from the base.
With what angle of elevation is Jessica looking at
the summit of the mountain?

Answers

It is 160 angle because it’s 1.4 miles and then 2 more miles

What number goes in the box?
394 -
= 153
A 242
B 547
C 240
D 241

Answers

Answer:

d

Step-by-step explanation:

394-153=241

D
Because 394-241=153
Easy math

What is the value of x in the equation 2(x−3) 9=3(x 1) x? x = −3 x = −1 x = 0 x = 3

Answers

The solution of the linear equation is x = 0.

What is the linear equation?

An equation is a mathematical statement, which has an equal sign (=) between the algebraic expression.

Linear equations are the equations of degree 1.

The given linear equation is;

[tex]\rm 2(x-3)+ 9=3(x+ 1) +x[/tex]

The value of x is determined in the following steps given below.[tex]\rm 2(x-3)+9=3(x+1)+x\\\\2x-6+9=3x+3+x\\\\\ 2x+3=4x+3\\\\3-3=4x-2x\\\\0=2x\\\\x=0[/tex]

Hence, the solution of the linear equation is x = 0.

To know more about linear equations click the link given below.

brainly.com/question/5085290

Answer:

x=0

Step-by-step explanation:

...

What is the y-intercept of the line: 8x - 4y = 20

Answers

Answer:

The y-intercept is 5

Step-by-step explanation:

First Step is to set y by itself:

4y = -8x + 20

y = -2x + 5

Remember: y = mx + b and b is the y intercept

b = 5

8x - 4y = 20
4y = 8x + 20
y = 2x + 5
y intercept = +5

What is the area of this figure? ​

Answers

Answer:

44 square units

Step-by-step explanation:

We can split the figure into 4 separate figures :

Left triangleRight triangleRectangleBottom right triangle

Area of the left triangle

Area = 1/2bh1/2 x 4 x 36 square units [A₁]

Area of the right triangle

It has the same lengths for base and height as the left triangleA₁ = A₂6 square units [A₂]

Area of the rectangle

Area = lb8 x 324 square units [A₃]

Area of the right triangle

Area = 1/2bh1/2 x 8 x 28 square units [A₄]

Area of the figure

A₁ + A₂ + A₃ + A₄6 + 6 + 24 + 830 + 1444 square units
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