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3 years ago

If 3 notebooks cost $3.51, how much would 7 notebooks cost?

Mathematics

2 answers:

Ket [755]3 years ago

8 0

Well, you would first divide 3÷ 3.15 Do you know what that would give you?

pychu [463]3 years ago

7 0

First, divide $3.51 by 3

3.51/3 = 1.17

Now, multiply the product by 7 to get the answer.

7 x 1.17 = 8.19

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Estimate the sum by rounding each number to the given place value.

romanna [79]

Answer:

400,000

Step-by-step explanation:

The given sum is 164,215+216,088

We simplify this to get:

164,215+216,088=380,303

The digit at the hundred thousand position is the rightmost 3.

The digit after it is 8.

Since 8≥5 we round up.

We add 1 to 3 to get 4 and replace all digits to the right with zeros.

We round to the nearest hundred thousand to get:

400,000

6 0

3 years ago

Evaluate the expression when x = -4.<br>5(x – 6) + 3x – 2

SVETLANKA909090 [29]

Answer:

-64

Step-by-step explanation:

5(x – 6) + 3x – 2

Distribute

5x - 30 +3x -2

Combine like terms

8x -32

Let x = -4

8*-4 -32

-32 -32

-64

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3 years ago

A trough is filled with water. The trough holds 315 gallons. Each cubic foot of water contains about 7.5 gallons. The trough is

elena55 [62]

Answer:

The height of the trough is about 1.5 ft

Step-by-step explanation:

If each cubic foot of water contains about 7.5 gallons.

Then; 315 gallons is about $\frac{315}{7.5}=42ft^3$

Let h be the height of the trough, then

$7\times 4\times h=42$

This implies that;

$28h=42$

Divide both sides by 28 to get:

$h=\frac{42}{28}$

$\therefore h=1.5$

The height of the trough is about 1.5 ft

4 0

2 years ago

Two functions are shown below.

fenix001 [56]

Answer:

the two functions intersect at (5,22)

Step-by-step explanation:

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3 years ago

Paulina used 4. 1/2 yards of cloth. 1. 3/8 yards of white cloth 2. 3/4 yards of blue cloth to make a. Costume.How much cloth she

NemiM [27]

2 + 3/8 + 6/8 = 16/8 + 9/8 =

25/8

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3 years ago

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