3 years ago

What is the algebraic expression for the following word phrase: the sum of 8m and 3?

Mathematics

1 answer:

Aloiza [94]3 years ago

8 0

8m+3

Because sum means adding so you add 8m and 3

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At the park, 4/7 of the children are boys. if there are 8 boys at the park, how many are girls?

Oksana_A [137]

There are 4/7 boys, so there are 3/7 girls.

Let the total number of children be x.

4/7x = 8
1/7x = 8 ÷ 4
1/7x = 2
3/7x = 2 x 3
3/7x = 6

There are 6 girls.

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3 years ago

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PLEASE HELP ME ASAP I REALLY NEED HELP!!!

padilas [110]

1) $\overline{UP}$

2) $\overline{UP} \cong \overline{UP}$

3) $\overline{UR}$

4) $\overline{PR}$

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1 year ago

The graph shown matches which quadratic equation?

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3 years ago

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What is the area of the triangle?

Tpy6a [65]

Answer:

20.25

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3 years ago

The LCM of two numbers is 60. Their GCf is 6 and their difference is 18. What are the two numbers?

Aliun [14]

$LCM(x,y)=60\\
GCF(x,y)=6\\
x-y=18\\\\
LCM(x,y)=\dfrac{|x\cdot y|}{GCD(x,y)}\\
60=\dfrac{|x\cdot y|}{6}\\
|x\cdot y|=360\\\\\\
|x\cdot y|=360\\
x-y=18\\\\
|x\cdot y|=360\\
x=18+y\\\\
|(18+y)\cdot y|=360\\
|18y+y^2|=360\\
18y+y^2=360 \vee 18y+y^2=-360\\
y^2+18y+81=441 \vee y^2+18y+81=-279\\
(y+9)^2=441 \vee (y+9)^2=-279\\
y+9=\sqrt{441} \vee y+9=-\sqrt{441}\\
y=21-9 \vee y=-21-9\\
y=12 \vee y=-30\\\\
x-12=18 \vee x-(-30)=18\\
x=30 \vee x=-12\\\\
\boxed{x=30, y=12 \vee x=-12, y=-30}$

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3 years ago

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