2 years ago

Pleaseeeee answer I will mark brainliest for best answer ^>^

Mathematics

2 answers:

Orlov [11]2 years ago

8 0

Answer: 7.6

Explanation:

Ede4ka [16]2 years ago

4 0

The answer is B. You just got to divide 57 by 7 1/2

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melomori [17]

Answer:

i think 36

Step-by-step explanation:

1152 / 32= 36

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2 years ago

For each incorrect answer on a test, the teacher changes the total points possible by - 3

Bogdan [553]

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Step-by-step explanation:

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2 years ago

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Find the coordinates of p so that p partitions AB in the ratio 1 to 3 with a(-5,4) and(7,-4)

vekshin1

P(x)=-15+7/4=-2
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8 0

3 years ago

Marco is 8 years younger than his brother Paolo. If their product of their ages is 105, how old is Marco? plz help

Nina [5.8K]

Answer:

Marco's age is 7 years old

Step-by-step explanation:

Let

x ----> Marco's age

y ----> Paolo's age

we know that

$x=y-8$ ----> $y=x+8$ ----> equation A

$xy=105$ ----> equation B

substitute equation A in equation B

$x(x+8)=105$

$x^2+8x-105=0$

Solve the quadratic equation

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+8x-105=0$

$a=1\\b=8\\c=-105$

substitute in the formula

$x=\frac{-8(+/-)\sqrt{8^{2}-4(1)(-105)}} {2(1)}$

$x=\frac{-8(+/-)\sqrt{484}} {2}$

$x=\frac{-8(+/-)22} {2}$

$x=\frac{-8(+)22} {2}=7$

$x=\frac{-8(-)22} {2}=-15$

Remember that the solution cannot be a negative number

The solution is x=7

therefore

Marco's age is 7 years old

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3 years ago

The electric bill in may was $215.00 In June the bill was $274.00 What is the percent of increase rounded to the nearest tenth ?

Murljashka [212]

You can complete this by solving:
$215 + 215(x) = 274$
Which should give you .274418 or 27.44%

4 0

3 years ago