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2 years ago

3(2+7) - 9 x 7 = 3+8 x 2 x 2 - 4 = 16 ÷ 2 x 5 x 3 ÷ 6 = Please answer! ✨✨

Mathematics

1 answer:

Thepotemich [5.8K]2 years ago

3 0

Answer:

At first, we have 3 expressions that are equal.

$3(2+7) - 9 \cdot 7= 3+8 \cdot 2 \cdot 2 - 4$

$6+21 - 63= 3+32 - 4$

$-36=31$

$-36\neq 31$

This is not true.

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200 3. A technician charges $25 per hour plus $50 for a house call to repair home computers. Make a table and a graph to show th

Tju [1.3M]

Recall that for a home visit, the technician charges $50 regardless on the time spent in the repair.

So, to find out the rate, we should calculate the part that depends on the spent time, and the add 50. So for example, we know that the technician spents 1 hour. So, we multiply 1 times 25 and then add 50. So, 25*1 + 50 = 75, which is the rate for a 1-hour repair.

So, in general, if we know that the number of hours is x, we multiply x times 25 and then add 50. Then a table would like this:

x 25*x 25*x +50

1 25 75

2 50 100

3 75 125

4 100 150

Note that as the time increases by one hour, the fare increases by 25. This is an example of a direct variation, since as the independent variable increases (t

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10 months ago

A portion of a map with cities a and b is shown.The map uses a scale of 1 inch to 30 miles. A new map has a scale of 2 inches=15

Alina [70]

Answer:

22.5miles

Step-by-step explanation:

For Map 1;

1 inches = 30miles

For Map 2:

2 inches = 15miles

1 inches = x

2x = 1 *15

x = 15/2

x = 7.5miles

This means that 1 inch represents 7.5miles on Map 2'

The distance between the two cities in miles = 30miles - 7.5miles

The distance between the two cities (in miles) = 22.5miles

3 0

2 years ago

9.51 as a mixed number in a simplest form

Triss [41]

Answer:

Below

Step-by-step explanation:

9 $\frac{51}{100}$

7 0

2 years ago

Read 2 more answers

Is 3/7 greater than 2/5?

Alexus [3.1K]

Answer:

Yes, 3/7 is bigger than 2/5

Step-by-step explanation:

First, put the fraction side by side

$\frac{3}{7}$ $\frac{2}{5}$

Multiply diagonally. So multiply 3 × 5 and 2 × 7

3 × 5 = 15

2 × 7 = 14

15 >14

$\frac{3}{7}$ > $\frac{2}{5}$

4 0

3 years ago

From a phone survey, a researcher determined that the true estimate for the proportion of voters who will reelect the mayor is l

patriot [66]

Here, p^ = (0.39 + 0.47)/2 = 0.43

The given interval is (0.43 - 0.04, 0.43 + 0.04).

Therefore, the margin of error is 0.04.

8 0

3 years ago