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Anastaziya [24]
4 years ago
10

90% on a test. If he answered 135 questions correctly, how many questions were on the test?

Mathematics
2 answers:
Anuta_ua [19.1K]4 years ago
8 0
150, you set up a proportion with 90 and 135, and 100 and x
USPshnik [31]4 years ago
3 0

Answer:

150

Step-by-step explanation:

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Non examples of graphs
Kipish [7]
A Non-example is like there we not enough to grapha
5 0
3 years ago
Read 2 more answers
Factor this x^3 + 27
masya89 [10]
(x+3)(x^2-3x+9)

this gets the x^3 while the 3x cancels out and 3*9=27

hope this helps although i didn't explain very well :)
8 0
3 years ago
jack has $7.55 of change in his pocket. if he has 4 more dimes than than nickels, and twice as many quarters as nickels, how man
dolphi86 [110]

Answer:

11 nickels, 15 dimes, 22 quarters

Step-by-step explanation:

number of nickels = x

number of dimes = x+4

number of quarters = 2x

- - - - - -

total of nickels = 5x cents

total of dimes = 10x + 40 cents

total of quarters = 50x cents

- - - - - -

755 = 5x + 10x + 40 + 50x

755 = 65x + 40

715 = 65x

x = 11

x+4 = 15

2x = 22

8 0
3 years ago
When two fractions are between 0 & 1 half how do you know which fraction is greater explaina
oksian1 [2.3K]
 Example- 1/3 or 1/5, which is larger? If you divide 1 by 3 the answer is 0.33 If you divide 1 by 5 it's 0.2. Since 0.33(1/3) is larger that would be the answer.
sorry if I make this confusing.
basically divide the top by the bottom to see which is larger. Then compare the fractions.
5 0
3 years ago
What is the multiple zero and multiplicity of f(x) = x3 + 10x2 + 25x?
elena-s [515]

Answer:

The multiple zero is x=-5.

The multiplicity is 2

Step-by-step explanation:

The given function is

f(x)=x^3+10x^2+25x

To find the zero of this function, we equate it to zero.

\Rightarrow x^3+10x^2+25x=0

We factor to obtain;

x(x^2+10x+25)=0

Observe that; the expression within the parenthesis is a perfect square.

This implies that;

x(x+5)^2=0

This implies that;

Either x=0 or (x+5)^2=0

(x+5)^2=0 has a multiple zero which is

x=-5 and its multplicity is 2.

3 0
4 years ago
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