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Vinvika [58]
3 years ago
7

A rectangular pond measures 3 m by 5 m. A concrete walkway of uniform width is constructed around the pond. If the walkway and p

ond together cover an area of 35 m2, how wide is the walk?
Mathematics
1 answer:
faltersainse [42]3 years ago
5 0

Answer:

2 m

Step-by-step explanation:

A=35

l=3+x

w=5+x

A=l*w

(3+x)(5+x)=35

15+3x+5x+x² = 35

x²+8x-20=0

x=2, -10

it cant have a negative length so x=2

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I’m having a crisis so please help 7x-19<16
vampirchik [111]

Answer:

5 i believe correct me if im wrong

Step-by-step explanation:

To work this problem out you would do it as if it were just a simple equation

7x-19<16 (you would first have to add 19 to both sides)

7x<35 (then you would divide by 7 to get the variable by itself)

x<5 ( you answer would then be 5)

7 0
3 years ago
4n - 9 = -9 how do u solve?
Ede4ka [16]
Add 9 to both sides to get 4n=0 so n=0

8 0
4 years ago
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3,000 is 10 times as much as
nalin [4]

3,000 is 10 times as much as

3000 = 10 times of what number

We need to find 10 times what number gives us 3000

Let the unknown number be x

3000 = 10 times x

3000 = 10x

To solve for x, we divide by 10 on both sides

\frac{3000}{10}=\frac{10x}{10}

300 = x

So, the unknown number is 300

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4 0
3 years ago
Read 2 more answers
I need help with these could you guys help me?
Elena-2011 [213]
The first one simplifies by collecting like terms to become:
7a²(4b²+9ab+10)
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4 0
3 years ago
Rewrite the equation below so that it does not have fractions.
lidiya [134]

Answer:

\frac{15}{20} x-2=\frac{8}{20}

Step-by-step explanation:

\frac{3}{4} x-2=\frac{2}{5}

3/4 and 2/5 have a common denominator which is twenty so you can rewrite the equation with just knowing that

\frac{3}{4} =\frac{15}{20}

\frac{2}{5} =\frac{8}{20}

\frac{15}{20} x-2=\frac{8}{20}

You can then multiply both sides by twenty to solve this equation.

Hope this helps.

4 0
3 years ago
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