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3 years ago

Whích ratio is not equivalent to the others?

Mathematics

1 answer:

Nimfa-mama [501]3 years ago

4 0

I want to say A because 3 and 5 have 15 and 6:15 is sounds like a ratio and D is just 4/10

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( -3+71i )+(9)= express your answer in the form ( a + bi )

Alex777 [14]

Answer:

6 + 71i

Step-by-step explanation:

-3 + 71i + 9

combine like terms

6 + 71i

8 0

3 years ago

Which inequality represents this sentence? Ten minus three is greater than one plus two.

a_sh-v [17]

Ten minus three ⇒ 10 - 3
One plus two ⇒ 1 + 2

Greater than use the symbol >

Ten minus three greater than one plus two
10 - 3 > 1 + 2
7 > 3

3 0

4 years ago

Read 2 more answers

The tax rate is 7.5% What is the tax on 110?

svetoff [14.1K]

The answer is 8.25

110/x=100/7.5
(110/x)*x=(100/7.5)*x - 
110=13.333333333333*x -
(13.333333333333) to get x
110/13.333333333333=x 
8.25=x 
x=8.25

3 0

4 years ago

Read 2 more answers

33. Suppose that the scores on a statewide standardized test are normally distributed with a mean of 78 and a standard deviation

tino4ka555 [31]

Given the scores on a statewide standardized test are normally distributed

Mean = μ = 78

Standard deviation = σ = 3

Normalize the data using the z-score by using the following formula and chart:

$z=\frac{x-\mu}{\sigma}$

Estimate the percentage of scores of the following cases:

(a) between 75 and 81

so, the z-score for the given numbers will be:

$\begin{gathered} 75\rightarrow z=\frac{75-78}{3}=\frac{-3}{3}=-1 \\ 81\rightarrow z=\frac{81-78}{3}=\frac{3}{3}=1 \end{gathered}$

As shown, the percentage when (-1 < z < 1) = 68%

(b) above 87

$87\rightarrow z=\frac{87-78}{3}=\frac{9}{3}=3$

The percentage when (z > 3) = 0.5%

(c) below 72

$72\rightarrow z=\frac{72-78}{3}=\frac{-6}{3}=-2$

The percentage when (z < -2) = 0.5 + 2 = 2.5%

(d) between 75 and 84

$\begin{gathered} 75\rightarrow z=\frac{75-78}{3}=-\frac{3}{3}=-1 \\ 84\rightarrow z=\frac{84-78}{3}=\frac{6}{3}=2 \end{gathered}$

The percentage when ( -1 < z < 2 ) = 68 + 13.5 = 81.5%

3 0

1 year ago

If cos theta = -2/5 and tan theta > 0, what is the value of sin theta?

allochka39001 [22]

Because tan theta > 0 and cos theta is negative this angle is in the third quadrant.

angle whose cos is 2/5 is 66.42 degrees

The required angle is 180 + 66.42 = 246.42 degrees answer.

3 0

3 years ago