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3 years ago

Please help thx 10 poin

Mathematics

1 answer:

Annette [7]3 years ago

7 0

Answer:

X = 55

Step-by-step explanation:

If the angel is 90:

75 + 90 = 165

165 divided by 3 = 55

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One day Mr. Pritz drove for 6 1/3 hours. The next day he drove 9 1/2 hours. For how many hours did he drive during the two days?

maks197457 [2]

Answer:

Step-by-step explanation:

First convert them into improper fractions: $6\frac{1}{3} =\frac{19}{3}$ and $9\frac{1}{2} =\frac{19}{2}$ . Now we add: $\frac{19}{2}+\frac{19}{3}=\frac{95}{6}$ or $15\frac{5}{6}$ .

7 0

3 years ago

The gcf of 42 and 70 is

Charra [1.4K]

The gcf of 42 and 70 is 14

7 0

3 years ago

Read 2 more answers

Question 21 pts

Pachacha [2.7K]

Answer:

x = -2 or x = -6 or x = sqrt(5) or x = -sqrt(5)

Step-by-step explanation:

Solve for x:

x^4 + 8 x^3 + 7 x^2 - 40 x - 60 = 0

The left hand side factors into a product with three terms:

(x + 2) (x + 6) (x^2 - 5) = 0

Split into three equations:

x + 2 = 0 or x + 6 = 0 or x^2 - 5 = 0

Subtract 2 from both sides:

x = -2 or x + 6 = 0 or x^2 - 5 = 0

Subtract 6 from both sides:

x = -2 or x = -6 or x^2 - 5 = 0

Add 5 to both sides:

x = -2 or x = -6 or x^2 = 5

Take the square root of both sides:

Answer: x = -2 or x = -6 or x = sqrt(5) or x = -sqrt(5)

8 0

3 years ago

Whats and how<br><br><br> 6 - 1 2/3

notka56 [123]

6-1 2/3=4 1/3

I hope this helps

5 0

3 years ago

Read 2 more answers

An article in a journal reports that 34% of American fathers take no responsibility for child care. A researcher claims that th

Gwar [14]

Answer:

correct option is D.0.0019

Step-by-step explanation:

given data

journal reports p = 34%

random sample n = 225

yielded = 97

solution

we get here first Sample proportion that is

Sample proportion p1 = $\frac{97}{225}$ ...............1

Sample proportion p1 = 0.4311

and here Null hypothesis is

H0 = p ≤ 0.34 ........................2

and

for Alternate hypothesis is

Ha = p > 0.34 ..........................3

so we get here z statistics that is express as

z = $\frac{p1- p}{\sqrt{\frac{p(1-p)}{n}}}$ ....................4

put here value and we get

$z = \frac{0.4311-0.34}{\sqrt{\frac{0.34(1-0.34)}{225}}}$

solve it we get

z = 2.88468

so here p-value for a test will be

P (z > 2.88468)

P = 1 - P (z < 2.88468)

P = 0.001957

so correct option is D.0.0019

7 0

3 years ago