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3 years ago

The one about distibutive property?

Mathematics

1 answer:

Angelina_Jolie [31]3 years ago

6 0

The answer for the distibutive oneis 7(4+6)

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Alex types 3 pages in the same amount of time that Erica types 4.5 pages. If Alex and Erica start typing at the same time, how m

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Answer:

12.5

Step-by-step explanation:

4.5 - 3 = 1.5, so 11 + 1.5 = 12.5

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2 years ago

A mother is currently 7 times older than her son. In 3 years time, she will be 5 times older than her son. Let x and y be the pr

Softa [21]

Answer:

If the child is currently 6 years old and the mom is 42, in three years she'll be 45 and he'll be 9

Step-by-step explanation:

The son is y and the mom is x

x=7y

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7y+3=5y+15

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3 years ago

Read 2 more answers

What is x given ABC~DBE.<br> Show your work

alexandr1967 [171]

x = 37.5 (or) $\frac{75}{2}$

Solution:

Given $\triangle A B C \sim \triangle D B E$

AC = 50, DE = 30, EC = 25, BE = x, BC = 25 + x

To find the value of x:

Property of similar triangles:

If two triangles are similar then the corresponding angles are congruent and the corresponding sides are in proportion.

$$\frac{BE}{BC} =\frac{DE}{AC}$

$$\frac{x}{25+x} =\frac{30}{50}$

Do cross multiplication, we get

$50x=30(25+x)$

$50x=750+30x$

Subtract 30x from both sides of the equation.

$20x=750$

Divide by 20 on both sides of the equation, we get

x = 37.5 (or) $\frac{75}{2}$

Hence the value of x is 37.5 or $\frac{75}{2}$ .

5 0

3 years ago

A praying mantis is an interesting insect that can rotate its head 180 degrees.Suppose the praying mantis at the right is 10.5 c

Charra [1.4K]

10.5 = 10 1/2 explanation is 1÷2 =0.5

3 0

3 years ago

Read 2 more answers

Lucy is a dress maker. She sews 4/7 of a dress in 3/4 hour. Lucy sees at a constant rate. At this rate, how many dresses does lu

IgorLugansk [536]

Answer:

Lucy sews $\frac{16}{21}$ dresses in 1 hour.

Step-by-step explanation:

Given:

Lucy sews $\frac{4}{7}$ of a dress in $\frac{3}{4}$ hour.

She sews at constant rate.

We need to find the number of dresses she makes in 1 hour.

In $\frac{3}{4}$ hour = $\frac{4}{7}$ dress

So in 1 hour = Number of dresses in 1 hour

By using Unitary method we get;

Number of dresses in 1 hour= $\frac{\frac{4}{7}}{\frac{3}{4}} = \frac{4}{7}\times \frac{4}{3}= \frac{16}{21}$

Hence Lucy sews $\frac{16}{21}$ dresses in 1 hour.

5 0

3 years ago