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3 years ago

7

you spent half of your weekly allowance at the movies. to earn more money your parents let you wash the car for $8. what is your

weekly allowance if you ended with $18?

1 answer:

Brrunno [24]3 years ago

4 0

20. 1/2 (n) + 8 = $20

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16 - x = -2 solve for x

poizon [28]

Answer:

16 - x = -2

16 + 2 = x

x = 18

hope it helps!

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3 years ago

-(x+3) = 2x-6 what is x

Makovka662 [10]

Answer:

x=1

Step-by-step explanation:

So, first you make sure to multiply the parenthesis by the negative so then it would be,

-x-3=2x-6

Then you add the -3 from the right to the other side

so, -x=2x-3

Then you want all the X variables to one side so you subtract the 2x to both sides.

so, -3x=-3

divide both by -3

x=1

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3 years ago

The Student Council is making 6 pennants to promote school spirit. Each pennant is in the shape of a right triangle 20 cm high a

hodyreva [135]

7200
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3 years ago

One day there is an accident and the tank cracks in 4 places. Water flows out of each crack at a rate of 12 liter per hour. An e

valentinak56 [21]

What’s the question?

5 0

3 years ago

the product of two consecutive integers n and n+1 is 42. what is the positive integer that satisfies the situation?

MrMuchimi

$n(n+1)=42 \\
n^2+n=42 \\
n^2+n-42=0 \\ \\
a=1 \\ b=1 \\ c=-42 \\ b^2-4ac=1^2-4 \times 1 \times (-42)=1+168=169 \\ \\
n=\frac{-b \pm \sqrt{b^2-4ac}}{2a}=\frac{-1 \pm \sqrt{169}}{2 \times 1}=\frac{-1 \pm 13}{2} \\
n=\frac{-1 -13}{2} \ \lor \ n=\frac{-1+13}{2} \\
n=\frac{-14}{2} \ \lor \ n=\frac{12}{2} \\
n=-7 \ \lor \ n=6$

The positive integer is 6.
The consecutive integers are 6 and 7.

8 0

3 years ago