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Alex Ar [27]
3 years ago
9

Fill in the blank.51+7=____+51

Mathematics
2 answers:
Lorico [155]3 years ago
7 0
51+7=7+51
the answer is 7
Irina18 [472]3 years ago
6 0

Answer:

I think the answer is 7

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What is the product? (-2x-9y^2)(-4x-3)
telo118 [61]

Answer:-8x^2-6x+36xy^2+27y^2

Step-by-step explanation:

using the FOIL method

6 0
3 years ago
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What is the first step when rewriting y = 3x2 9x – 18 in the form y = a(x – h)2 k?
stiks02 [169]
A quadratic equation has the general form of: <span>

y=ax² + bx + c

It can be converted to the vertex form in order to determine the vertex of the parabola. It has the standard form of:

y = a(x+h)² - k

This can be done by completing a square. The steps are as follows:

</span><span>y = 3x2 + 9x – 18
</span>y = 3(x2 <span>+ 3x) – 18
</span>y + 27/4= 3(x2 <span>+ 3x+ 9/4) – 18 
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Therefore, the first step is to group terms with the variable x and factoring out the coefficient of x^2.
3 0
3 years ago
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1. 2x-(3y +4)=2x-3y +4<br> What’s wrong with it
wolverine [178]

Answer:

2x-(3y +4)=2x-3y+4

Nothing is wrong with it

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2 years ago
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A bird traveled 4 miles north before stopping to rest. The bird then flew 2,640 yards south in search of food. Finally, it flew
Mnenie [13.5K]
The bird was 13200 yards away from its original starting point.
8 0
3 years ago
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A used book store also started selling used CDs and videos. In the first week, the store sold a combination of 40 CDs and videos
nadya68 [22]

Answer:

The total number of CDs sold is 30, and the number of videos is 10.

Step-by-step explanation:

Consider A is the number of Videos sold.

Consider B is the number of CDs sold.

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A+ B= 40, B=40 -A

and

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Replacing,  B=40 -A in the second equation

$6*A+ $4*(40 -A)=$180

Distributive property

$6A+ $160 -$4A=$180

$6A -$4A=$180 - $160

$2A=$20

A=$20/$2=10

and B=40 -A, so B=40-10=30

That means, the number of Videos sold is 10

And the number of CDs sold is 30

6 0
3 years ago
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