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3 years ago

14

a student answers 90% of the questions on a math exam correctly. if he answers 27 questions correctly how many questions are on

the exam?

1 answer:

kodGreya [7K]3 years ago

6 0

Answer:

30

Step-by-step explanation:

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Solve the equation by factoring. z2 − 6z − 27 = 0

Kisachek [45]

The answer is x= 9 and -3

You must fine 2 number that multiply to equal -27 and add to equal -6

(x-9) (x+3)
Then equal the parts of the binomial to zero

x - 9 = 0
x + 3 = 0

You must get x by its self.
When you do so, you'll have the answer as -3 and 9

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3 years ago

Each letter represents a question answer

evablogger [386]

A. 2x+3x-6=10+4x

5x-6=10+4x

5x=16+4x

X=16

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3 years ago

Answer C and D please

DENIUS [597]

Answer:

C. solution:

3(3c-2) = 5(2c-1)

or, 9c-6 = 10c-5

or, -6+5 =<em> </em>10c-9c

or, -1 = 1c

Hence, c = -1.

D. solution:

5(5-2a) = 4(6-a)

or, 25-10a = 24 - 4a

or, 25-24 = -4a+10a

or, 1 = 6a

or, 1/6 = a

Hence, a = 1/6.

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3 years ago

What is the probability of the spinner landing on 2?

mario62 [17]

Answer:

1/4

I hope this helps!

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3 years ago

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7 less than a number k is 18

Elena-2011 [213]

Answer:

$k-7=18$ ; k=25

Step-by-step explanation:

$k(-7+7)=18+7\\18+7=25\\k=25$

7 less than 25 (or K) is 18.

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3 years ago

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