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lapo4ka [179]
2 years ago
7

The dimensions of a rectangular garden were 3 m by 10 m. When both dimensions were increased by equal amounts, the area of the g

arden doubled. Find the dimensions of the new garden.
Mathematics
1 answer:
Helen [10]2 years ago
4 0

A=l*w

A=3*10

30=A

add x to l and w the area doubled

60 = (3+x)(10+x)

FOIL

60 = 30 +3x+10x+x^2

60 = x^2 +13x+30

subtract 60 from each side

0=x^2 +13x-30

factor

0=(x+15) (x-2)

x+15=0  x-2=0

x=-15  x=2

x cannot be negative so x=2

new dimensions

3+2, 10+2

Answer: 5m ,12m

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NeTakaya

Answer:

1/6

1/12

1/2

Step-by-step explanation:

There are three possible outcomes in the left spinner, and four possible outcomes in the right spinner.  So there are a total of 3×4=12 possible combinations.  We can show that by making a grid:

\left[\begin{array}{cccc}&R&B&G\\R&RR&BR&GR\\B&BR&BB&BG\\P&PR&BP&GP\\Y&RY&BY&GY\end{array}\right]

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There is only 1 outcome in which the first spinner lands on R <em>and</em> the second spinner lands on P (PR), so the probability is 1/12.

There are 6 outcomes in which the first spinner lands on R <em>or</em> the second spinner lands on P (RR, BR, PR, RY, BP, GP).  So the probability is 6/12 = 1/2.

7 0
3 years ago
Solve for x:<br><br>− 10x + 4 = − 7x − 14 −7x −14<br><br><br>PLEASE HELP ME!
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Step-by-step explanation:

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x = -8.

7 0
3 years ago
Read 2 more answers
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