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Soloha48 [4]
2 years ago
8

Can someone please help me with this test question?

Mathematics
1 answer:
Igoryamba2 years ago
8 0

Answer:

x=−4+√13 or x=−4−√13

Can I have brainliest? I need it for a challenge

Step-by-step explanation:

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What is the exact area of the following circle?
pychu [463]

Answer:

56.25 pi  cm^2

Step-by-step explanation:

To find the area of the circle,

we use the formula

A = pi r^2, where r is the radius

We know the diameter is 15 so we can find the  radius from

r = d/2  where d is the diameter

r = 15/2

A = pi ( 15/2) ^2

A = pi ( 225/4)

A = 56.25 pi  cm^2

3 0
2 years ago
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The ratio of boys to girls in a group is 7:1. If there are 66 more boys than girls, work out how many girls there are
nevsk [136]

Answer:11

Step-by-step explanation:

Boys : girls=7:1

Sum of ratio=7+1=8

Let them number of girls be y

Then they number of boys=y+66

Total number of pupils=y+y+66

Total number of pupils=2y+66

Number of girls=(girls ratio)/(sum of ratio) x (total number of pupils)

y=1/8 x (2y+66)

Cross multiply

y x 8=2y + 66

8y=2y + 66

Collect like terms

8y-2y=66

6y=66

Divide both sides by 6

6y/6=66/6

y=11

The number of girls is 11

4 0
2 years ago
Use long division to find the quotient below. (5x5 -5x3 - 10x2 - 80x) = (x+2)
kykrilka [37]

Answer: c

Step-by-step explanation:

8 0
3 years ago
There are 4 consecutive integers that have a sum of 54. What is the greatest of the 4 integers?
Tanya [424]

Answer:

x + x-1 + x-2 + x-3 =54.

x-1

3 0
2 years ago
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Help me I promise I will give you guys brainliest
avanturin [10]

Answer:  0.421

i can add the way to get the answer if you want too

8 0
2 years ago
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