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Arada [10]
3 years ago
5

le" class="latex-formula">
Mathematics
1 answer:
Bezzdna [24]3 years ago
7 0

Answer:

x²-9=x²-3²=(x+3)(x-3)

Step-by-step explanation:

use formula

a²-b²=(a+b)(a-b)

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Mathematical
Ivenika [448]

Answer:

7

Step-by-step explanation:

32 - 2 = 30

30 - 2 = 28

From those 28 left that Sarah has left, divide by 4 to get 7 in each group remaining.

4 0
2 years ago
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The questions are included in the images below. If you can solve AND EXPLAIN it to me, then I will give brainliest to whoever an
Feliz [49]

Answer:

blep

Step-by-step explanation:

Higher then the levels of ten and lower of the x-axis through the ten starting with negative ten to y axis 10

3 0
4 years ago
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Lucy is using a one-sample t ‑test based on a simple random sample of size n = 22 to test the null hypothesis H 0 : μ = 16.000 c
slega [8]

Answer:

The value of test statistic is 1.338

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 16.000

Sample mean, \bar{x} = 16.218

Sample size, n = 22

Alpha, α = 0.05

Sample standard deviation, s = 0.764

First, we design the null and the alternate hypothesis

H_{0}: \mu = 16.000\text{ cm}\\H_A: \mu < 16.000\text{ cm}

We use one-tailed t test to perform this hypothesis.

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{16.218 - 16.000}{\frac{0.764}{\sqrt{22}} } = 1.338

Thus, the value of test statistic is 1.338

4 0
4 years ago
PLEASE HELP WILL MARK BRAINILIEST!!!
muminat

Answer:

y=-50x-20

Step-by-step explanation:

6 0
3 years ago
A skydiver falls 144 feet in 3 seconds. How far does the skydiver fall per second?
Mekhanik [1.2K]
If a skydiver falls 144 feet in 3 seconds in you need to find the time per second that they’re falling, you would simply have to get the time per one second. You have to get the 3 to one, so you would divide by 3 on both sides, getting 48 feet per second. (assuming they fell at the same rate all 3 seconds)
5 0
3 years ago
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