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Likurg_2 [28]
2 years ago
9

Solve For X. 5 - 2x^2 = -15

Mathematics
2 answers:
Dvinal [7]2 years ago
4 0

Answer:

\sqrt{10}

Step-by-step explanation:

5 - 2x^2 = -15

2x^2 = 20

x^2=10

x= \sqrt{10}

DiKsa [7]2 years ago
3 0
-15-5= -20
Thus, -2x^2 = -20
Then -20/-2= 10
So, x^2 = 10
When you square root both of them, the answer is root 10
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3 years ago
1) Solve the following System of Equations by Graphing. Label the solution and all intercepts. (5 points)
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(-0.6 , -5.2)

Step-by-step explanation:

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An ectopic pregnancy is twice as likely to develop when the pregnant woman is a smoker as it iswhen she is a nonsmoker. If 32 pe
Dmitriy789 [7]

Answer:

48.48%

Step-by-step explanation:

Let's assume that there is a number N of women.

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Let's assume that the probability of having a ectopic pregnancy for a non-smoker is p (and the probability for a smoker will be 2*p)

Then the number of women with an ectopic pregnancy that are non-smokers is:

p*0.68*N

The number of women with an ectopic pregnancy that are smokers is:

2*p*0.32*N

Then the total number of women with an ectopic pregnancy will be:

p*0.68*N + 2*p*0.32*N

The percentage of women having an ectopic pregnancy that are smokers is equal to the quotient between the number of women with an ectopic pregnancy that are smokers and the total number of women with an ectopic pregnancy, all that times 100%.

The percentage is:

P = \frac{2*p*0.32*N}{p*0.68*N + 2*p*0.32*N} *100\%

Taking p and N as common factors, we get:

P = \frac{2*p*0.32*N}{p*0.68*N + 2*p*0.32*N} *100\% = \frac{N*p}{N*p} \frac{2*0.32}{0.68 + 2*0.32} *100\%

Then we get:

\frac{2*0.32}{0.68 + 2*0.32} *100\% = 48.48\%

8 0
3 years ago
If 45% of a number, n, is 225, what is 74% of n?<br><br> A. 185<br> B. 298<br> C. 370<br> D. 406
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Answer:

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Step-by-step explanation:

4 0
3 years ago
Find the slope easy giving brainlest
Korvikt [17]

Answer:

<u>Problem 20:</u> m = 2

<u>Problem 21:</u> m = -2

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<u>Problem 23:</u> m = 3

Step-by-step explanation:

The formula to find the slope of a line: m = \frac{y_{2} - y_{1}}{x_{2}-x_{1}}.

<u>Problem 20:</u>

1) Substitute the values into the formula and solve it.

m = \frac{3-7}{2-4}

m = \frac{-4}{-2}

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<u>Problem 21:</u>

1) Substitute the values into the formula and solve it.

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m = \frac{-6}{3}

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<u>Problem 22:</u>

1) Substitute the values into the formula and solve it.

m = \frac{3-7}{-6--2}

m = \frac{-4}{-4}

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<u>Problem 23:</u>

1) Substitute the values into the formula and solve it.

m = \frac{-4-2}{-4--2}

m = \frac{-6}{-2}

m = 3

<em />

<em>*Extra*</em>: The equation of a line is written in this form: y = mx+b, where m is the slope and b is y-intercept

7 0
2 years ago
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