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3 years ago

10

In trying to calculate the product of 5 and 12 in her head, Evie first multiplied 5 times 10 and then added the result to the pr

oduct of 5 and 2. Evie correctly found the product by using which of the following?

1 answer:

Pie3 years ago

7 0

Answer:

Step-by-step explanation:

distributive

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PLEASE HELPPP (NO LINKS) (NO LINKS) (NO LINKS)

rosijanka [135]

Answer:

B, B, C

Step-by-step explanation:

1.

Shirts cost $20 each and ties cost $12 each.

<u>Expression for the cost:</u>

20s + 12t

Correct choice is B

2.

<u>An expression that represents 40% of a number is:</u>

40*n/100 = 0.4n

Correct choice is B. False

3.

t = -2, x = 3 and z = 5

4z + 3x − t =
4*5 + 3*3 - (-2) =
20 + 9 + 2 =
31

Correct choice is C. 31

3 0

3 years ago

Read 2 more answers

MakcuM [25]

Answer:

B

Step-by-step explanation:

x + y =6

x - y = 4

A. 3+3=6, but 3-3 doesn't equal 4

B. 5+1=6 and 5-1 equals 4

C. 6+0 equals 6 but 6-0 doesn't equal 4

D. 2+4 equals 6 but 2-4 doesn't equal 4

4 0

2 years ago

Use the figure below to answer the questions.

Archy [21]

Answer:

a. What is the name of the 3D shape?

The name of the 3D shape is Prism

b. What is the formula for total surface area for this shape?

Total surface area:

$S=2A_{b}+P_{b}h$

c. What is the surface area of the figure?

The surface area of the figure is 144 cm²

Step-by-step explanation:

a. What is the name of the 3D shape?

The 3D shape has two congruent and parallel faces (triangles) and the other faces are parallelograms, then the 3D shape is a prism

b. What is the formula for total surface area for this shape?

Total Surface area:

$S=2A_{b}+P_{b}h$

where:

Area of the base of the prism: Ab

Perimeter of the base: Pb

Height of the prism: h

c. What is the surface area of the figure?

The base of the prism is a triangle. Then to calculate the area of the base, we must use the formula to calculate the area of a triangle:

$A_{b}=\frac{bh}{2}\\ A_{b}=\frac{(4 cm)(3 cm)}{2}\\ A_{b}=\frac{12cm^{2} }{2}\\ A_{b}=6cm^{2}$

The perimeter of the base is the perimeter of the triangle, equal to the sum of the sides of the triangle:

$P_{b}=4cm+3cm+5cm\\ P_{b}=12cm$

h: Height of the prism is the distance between the bases of the prism (the triangle), then h=11 cm

Then, replacing in the formula the known values:

$S=2(6 cm^{2})+(12 cm)(11 cm)\\ S=12 cm^{2}+132 cm^{2}\\ S=144 cm^{2}$

8 0

3 years ago

There are 1,200 people at the beach. If 88% of them went in the water, how many people DID NOT go in the water?

kiruha [24]

Answer:

144 people

Step-by-step explanation:

88% = 0.88

We multiply the total number with 0.88 to see how many people went in the water:

1200(0.88) = 1056

To find the number of those who did NOT go in the water, we subtract the product from the total number:

1200 - 1056 = 144

4 0

3 years ago

Read 2 more answers

Dennis made a scale drawing of his backyard using the scale 1/4 inch =3 feet the rectangular swimming pool was 2 inches long and

seraphim [82]

(1/4)x = 2

x = 8 x 3 = 24 feet long

(1/4)x = 1

x = 4 x 3 = 12 feet wide

24ft x 12ft = 288ft^2

3 0

2 years ago