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Alexandra [31]
3 years ago
5

PLs help I will def make you brainlist pls help both 8,9

Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
5 0

Answer:

The answers are A and C

Step-by-step explanation:

Have a good day

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the length of a rectangle is five feet less than its width. If the area of the rectangle is 84 square feet, find its dimensions
KIM [24]
Let
x---------> the length of the rectangle
y--------> the width of the rectangle

we know that
A=84 ft²
[area of rectangle]=x*y-----> 84=x*y-----> equation 1
x=y-5------> equation 2
substitute 2 in 1
84=[y-5]*y-----> 84=y²-5y---------> y²-5y-84=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
y=12
x=y-5-----> x=12-5-----> x=7

the answer is
the length of the rectangle is 7 ft
the width of the rectangle is 12 ft

6 0
3 years ago
Karina needs a total of $45 to buy her mother a birthday present. She has saved 20% of the amount so far. How much has she saved
CaHeK987 [17]

Answer:

$9

Step-by-step explanation:

20% of 45 is 9.

4 0
3 years ago
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What are three other expressions that are equivalent to 8x-12
Kisachek [45]

Answer:

2(4x-6)

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Step-by-step explanation:

find all factors of 8 other than 1, you should have 3

divide the whole equation by the factor then multiply by the factor

2(8x-12)/2 = 2(4x-6)

4(2x-3)

8(x-3/2)

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3 years ago
Shannon has 1 nickel, 2 dimes, and 5 unknown coins totaling $0.81. What kind of coins does Shannon have and how many are there o
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Answer:

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2 years ago
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Is 5622 divisible by 4
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Well it's 1,405.5 so no
7 0
3 years ago
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