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3 years ago

Someone can help me with 31 & 33? i need help

Mathematics

2 answers:

Setler [38]3 years ago

8 0

Answer:

for 31. The answer is 20

Step-by-step explanation:

f(12)=-2(12)+4=20

nika2105 [10]3 years ago

3 0

31. It gives you the equation f(x) = -2x + 4 and asks you to solve for f(12). To solve this you must replace x in the equation -2x + 4 with 12 like so:

-2(12) + 4

Remember that when solving this use your rules of PEMDAS. In this case you will first multiply -2 and 12 then add the product with 4

-24 + 4

f(12) = -20

33. Replace x in the equation x³ - x with 5 like so...

5³ - 5

Again, remember to use the rules of PEMDAS to solve this. First take the cube of 5 then subtract 5 from the answer

125 - 5

g(5) = 120

Hope this helped!

~Just a girl in love with Shawn Mendes

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3 years ago

Find the measure of angle y. Round your answer to the nearest hundredth. (please type the numerical answer only) (6 points)

wolverine [178]

Answer:

35.68°

Step-by-step explanation:

In the picture attached, the triangle is shown.

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3 years ago

Consider H0: μ = 45 versus H1: μ < 45. A random sample of 25 observations produced a sample mean of 41.8. Using α = .025 and

a_sh-v [17]

Given
$H0: \ \mu=45 \\ \\ H1: \ \mu\ \textless \ 45$
This is a one-tailed test.

$z= \frac{41.8-45}{6/ \sqrt{25} } = \frac{-3.2}{6/5} = \frac{-3.2}{1.2} =-2.6667$

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Since the p-value of the sample statistic (0.00383) is less that the significant level (0.025), we reject the null hypothesis.

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3 years ago

Use +,-,x, ÷ and parentheses to connect the numbers 1,3,5 and 7 such that the result is 24.

Alborosie

Answer: (3-1)×(7+5)

Step-by-step explanation:

There are mainly several ways to get 24

- 2×12

- 3×8

- 4×6

- add all of them together

- complicated ones can include large numbers minus another large number

Use try-check-revise, to find the way that fits 24

For this question, we used 2×12, which results in (3-1)×(7+5)

Hope this helps!! :)

Please let me know if you have any questions.

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