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3 years ago

Factor by grouping:

2 answers:

3 0

$(x-y)^2=x^2-2xy+y^2\\---------------------------\\\\4-12r+9r^2=2^2-2\cdot2\cdot3r+(3r)^2=(2-3r)^2$

$other\ method:\\\\4-12r+9r^2=4-6r-6r+9r^2=2(2-3r)-3r(2-3r)\\\\=(2-3r)(2-3r)=(2-3r)^2$

faust18 [17]3 years ago

3 0

Because:
$(a-b)^2=a^2+2ab+b^2$

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Define the pattern 1,3,9,27 next three terms

mixer [17]

81 , 243 , 729 the pattern is mutiply each by three

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3 years ago

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A sporting goods stores sells footballs, basketballs, and volleyballs. A football costs $35, a basketball costs

wlad13 [49]

Answer:

The number of footballs, basketballs and volleyballs were sold are 75, 36 and 15 respectively.

Step-by-step explanation:

Consider the provided information.

A football costs $35, a basketball costs $25 and a volleyball costs $15.

Let F represents the football, B represents the basketball and V represents the volleyball.

On a given day, the store sold 5 times as many footballs as volleyballs.

$F=5V$ ......(1)

They brought in a total of $3750 that day,

$35F+25B+15V=3750$ ......(2)

The money made from basketballs alone was 4 times the money.

$25B=4(15V)$ ......(3)

By equation 1, 2 and 3.

$35(5V)+4(15V)+15V=3750$

$250V=3750$

$V=15$

Substitute the value of V in equation 1 and 3.

$F=5(15)=75$

$25B=4(15\times 15)\\B=36$

Hence, the number of footballs, basketballs and volleyballs were sold are 75, 36 and 15 respectively.

8 0

3 years ago

Emily sells bracelets for $12 each. She wants to discount them so that they only cost $9. What percent will she need to discount

Sliva [168]

100/12*9=75 thus 25% less

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3 years ago

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How much sales tax will Nicole pay on a 36$ shirt if the tax rate is 7%

deff fn [24]

When you multiply 36 by 7% you get 2.52
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3 years ago

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snow_lady [41]

Ab= 10
Ad= 2Ab+8
Perimeter of parallelogram is 2(a+b)
So 2(2ab+8)+2(ab)=6ab+16
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3 years ago