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2 years ago

11

A lawn is 4m longer than it is wide. The total area of the lawn is 30 metres squared. What is its perimeter? Give your answer to

2 d.p.

1 answer:

polet [3.4K]2 years ago

5 0

Answer:

7.5

Step-by-step explanation:simply divide 30 and 4 and the answer is 7.5

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If h= 1/2mk ,express m in terms of h and k

Sergeeva-Olga [200]

we are given

$h=\frac{1}{2}mk$

Since, we have to solve for m

so, we will isolate m on anyone side

step-1: Multiply both sides by 2

$2*h=2*\frac{1}{2}mk$

$2h=mk$

step-2: Divide both sides by k

$\frac{2h}{k} =\frac{mk}{k}$

$\frac{2h}{k} =m$

so, we get

$m=\frac{2h}{k}$ ..............Answer

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4 years ago

In a school the number of girls exceeds the number of boys by 15%. Find the ratio of the numbers of boys to girls,

Artemon [7]

Answer:

3x-x+2=4

Step-by-step explanation:

Number of boys = x

Number of girls = x plus 15% of x = 1.15x

Ratio of boys to girls x:1.15x = 1:1.15 = 20:23 $\\$

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2 years ago

Which list shows the contestants in order by their completion times from fastest to slowest?

Ostrovityanka [42]

Answer:

Leah, Reba, Alexis, Kari

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3 years ago

Y = 7x + 9<br> 2y + 2x = -18

zvonat [6]

Answer:

Step-by-step explanation:

Just multiply the first equation by -1 and then add them together to find x. Should look something like

-2x - y = -7

5x + y = 9

--------------------

3x + 0 = 2

x = 2/3

Now back substitute using either equation to find y. I'll use the first:

2(2/3) + y = 7

4/3 + y = 7

y = 7 - 4/3 = 21/3 - 4/3 = 17/3

Answer:

x=2/3

y=17/3

5 0

3 years ago

Read 2 more answers

Need help pleaseee i have a test on friday

larisa [96]

Answer:

x = 8

Step-by-step explanation:

Using the sine or cosine ratio in the right triangle and the exact value

sin30° = $\frac{1}{2}$ , then

sin30° = $\frac{opposite}{hypotenuse}$ = $\frac{4}{x}$ = $\frac{1}{2}$ ( cross- multiply )

x = 8

5 0

3 years ago