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Serga [27]
3 years ago
8

HELP TIMED TEST!!!!!!

Mathematics
1 answer:
aalyn [17]3 years ago
7 0

Answer:

-4 and 9

Step-by-step explanation:

factored

(x - 9)(x + 4) = 0

with   this  x*x - 5x - 36 = 0

so  x = 9  or  x = -4

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1/y - 1/x = 1/60<br> 3y - 2x = 6 <br> (Simultaneous question)
Daniel [21]

1y - 1/x = 1/60 = x*y =60 = x=60/y

3y - 2(60/y) = 6

3y^2-120=6y

3(y^2-40-2y) =0

y^2-40-2y=0

y = 7.4


3(7.4)-2x=6

22.2-2x = 6

2x = -16.2

x = -8.1



6 0
3 years ago
A class is made up of 10 boys and 4 girls. Half of the girls wear glasses. A student is selected at random from the class. What
Andreas93 [3]

Hi!

Add the student together to get the number of students

10+4 = 14

Divide the girls by half

4/2 = 2

2/14 is the answer for this question.

<em>Hope this helps! Have an amazing day <3</em>

<em />

4 0
3 years ago
Please help me answer this
defon

Answer:

It looks like the third one, C

Step-by-step explanation:

Every time c increases by 1, d increases by 2

That means the slope will be 1/2

That means the slope is positive

Which means that there can only be one answer, C

6 0
3 years ago
Read 2 more answers
A swimming pool in the shape of a rectangular prism is 30 feet long.15 1/2 feet wide,and 6 feet deep.How much water could the sw
goldfiish [28.3K]
It would be 2790 units squared
5 0
3 years ago
You can buy 5 cans for green beans at the HyVee for $2.20. You can buy 15 of the same cans of beans at Sam's Club for $7.90. Whi
Alex Ar [27]

Sam's

I need more letters

3 0
3 years ago
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