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daser333 [38]
3 years ago
15

4. The perimeter of a rectangle is 42 yards.

Mathematics
1 answer:
kenny6666 [7]3 years ago
8 0

Answer:

Step-by-step explanation:

Let width = x

Length = 7 + x

Perimeter = 42 yards

2*(length + width) = 42

2* ( 7 + x + x) = 42

7 + 2x = 42/2

7 + 2x = 21

2x = 21 - 7

2x = 14

x = 14/2

x = 7

Width = 7 yards

Length = 7 + 7 = 14 yards

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The perimeter of a college athletic field is 96 meters and the length is 16 m more than the width. Find the length and width.
Andre45 [30]
In order to figure this out, you are going to do the math backwards. If the perimeter of the entire field is 96 meters, you will want to remove 16, which will give you 80 meters. You will then divide this by 2, giving you 40 meters. The width of the field will be 40 meters. That means that the length of the field is going to be 56 meters.
3 0
3 years ago
na2s + hcl _____ nacl + h2s Which of these would represent the coefficients needed to balance this equation? A) 1, 1, 1, 1 B) 1,
USPshnik [31]

Answer:

B) 1, 2, 2, 1

Step-by-step explanation:

In given equation:

Left side:                                Right Side:

  2 Na                                          1 Na

  1 S                                              1 S

  1 H                                             2 H

  1 Cl                                             1 Cl

To equal the number of Na and H atoms on both sides, HCl and NaCl will have a coefficient of 2 to balance the equation while Na₂S and H₂S will have a coefficient of 1.

1 Na₂S + 2 HCl ⇒ 2 NaCl + 1 H₂S

5 0
3 years ago
Giving brainliest!!!!!!!!!!
crimeas [40]
It’s C. hope this helped and good luck !!
5 0
3 years ago
Read 2 more answers
Write the equation of the line shown in the graph. Please help.
jeka57 [31]

Answer:

y = 3

Step-by-step explanation:

The y-coordinate of all points on the graph is 3.

The equation is y = 3

3 0
3 years ago
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Suppose the population of a certain city is 5289 thousand. It is expected to decrease to 4530 thousand in 50 years. Find the per
Tcecarenko [31]

Answer:

14.4% decrease

Step-by-step explanation:

Here is the formula for finding the percentage of decrease:

(starting value - final value) / starting value * 100.

So for your question,

\frac{5289-4530}{5289} =.0144\\.0144 * 100 = 14.4\\/

There was a 14.4% decrease within 50 years.

5 0
3 years ago
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