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aivan3 [116]
3 years ago
7

determine if these equations are true or false A. 50 tens x 4 hundreds = 40 tens x 5 hundreds B. 24 x 10 x 90 = 90 x 2400​

Mathematics
1 answer:
Lostsunrise [7]3 years ago
5 0

Answer:

a is true   b is false

Step-by-step explanation:

A explanation

50*400=20000

40*500=20000

B explanation

24*10*90=21600

90*2400=216000

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is B
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Determine the volume of a square pyramid that has a height of 7 inches and a base with a side
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Answer:

v=58.33in^3

Step-by-step explanation:

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The sides of an equilateral triangle are all 8 units long. What is the length of the triangle’s altitude?
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Step-by-step explanation:

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5 0
3 years ago
300 is 5% of what number
Ber [7]
At first I learned to do these equations as Part÷Whole=Percent÷100
Part(The portion)=300
Whole=X
Percent=5
So now you have
300÷X=5÷100
Set this up as a fraction and cross multiply.
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8 0
3 years ago
Read 2 more answers
12) Add the fractions, and simplify if possible.<br><br> (y+7)/(y^2-y-12) - 2/(y^2-9)
lianna [129]

Answer:

\dfrac{y^2+2y-13}{(y-4)(y+3)(y-3)}

Step-by-step explanation:

Given the expression

\dfrac{y+7}{y^2-y-12}-\dfrac{2}{y^2-9}

First, factor each denominator:

1. y^2-y-12=y^2-4y+3y-12=y(y-4)+3(y-4)=(y-4)(y+3)

2. y^2-9=(y-3)(y+3)

Now the expression is

\dfrac{y+7}{(y-4)(y+3)}-\dfrac{2}{(y-3)(y+3)}

Now, multiply the first numerator by (y-3) and the second by (y-4) and write the result as a fraction with denominator (y-4)(y+3)(y-3):

\dfrac{(y+7)(y-3)-2(y-4)}{(y-4)(y+3)(y-3)}=\dfrac{y^2-3y+7y-21-2y+8}{(y-4)(y+3)(y-3)}=\dfrac{y^2+2y-13}{(y-4)(y+3)(y-3)}

This fraction cannot be simplified more.

3 0
4 years ago
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