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4 years ago

What equation is equivalent to 3(a+4)-5(a-2)=22

Mathematics

1 answer:

Ratling [72]4 years ago

3 0

Answer:

the answer would be 234

Step-by-step explanation:

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Which answer is the correct “reason” for step 1?

Alecsey [184]

hi dude the answer is

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4 years ago

Simplify (6⁴)³ A. b B. b³ C. b⁹ D. b¹²

-Dominant- [34]

Answer is d
it would be b^12

5 0

3 years ago

Read 2 more answers

I will give u BRAINLIEST for the correct answer

marysya [2.9K]

Answer:

1:6

Step-by-step explanation:

12+4+8= 24 total fruit.

4 bananas : 24 total = 1:6

7 0

3 years ago

A recent national survey found that high school students watched an average (mean) of 7.2 movies per month with a population sta

VladimirAG [237]

Answer:

1. Option A

2. Option D) Reject null hypothesis if z < –1.645

3. z = -4.90

4. P-value = 0.00001

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 7.2

Sample mean, $\bar{x}$ = 6.5

Sample size, n = 49

Alpha, α = 0.05

Population standard deviation, σ = 1.0

a) First, we design the null and the alternate hypothesis

$H_{0}: \mu \geq 7.2\text{ movies per month}\\H_A: \mu < 7.2\text{ movies per month}$

Option A) is the correct answer

We use one-tailed(left) z test to perform this hypothesis.

c) Formula:

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

Putting all the values, we have

$z_{stat} = \displaystyle\frac{6.5 - 7.2}{\frac{1}{\sqrt{49}} } = -4.90$

b) Now, $z_{critical} \text{ at 0.05 level of significance } = -1.645$

Rejection rule:

If calculated z-statistic is less than the critical z-value, we reject the null hypothesis.

Option D) Reject null hypothesis if z < –1.645

d) Now, we calculate the p-value with the help of standard normal table.

P-value = 0.00001

Since the p-value is lower than the significance level, we fail to accept the null hypothesis and reject it.We accept the alternate hypothesis.

We conclude that the college students watch fewer movies a month than high school students.

6 0

3 years ago

Señor Ochoa is planting a garden in the corner of his yard. Before he does any planting, however, he wants to make a scale drawi

snow_tiger [21]

Answer:

The new scale drawing is $6\ \frac{cm}{m}$

the new dimensions of the scale drawing in the attached figure

Step-by-step explanation:

Find the original scale drawing

we know that

6 cm in the drawing represent 3 meters in the actual

$\frac{6}{3}\ \frac{cm}{m}$

Simplify

The original scale was $2\ \frac{cm}{m}$

That means ---> 2 cm in the drawing represent 1 meter in the actual

Find the new scale drawing

we know that

18 cm in the drawing represent 3 meters in the actual

$\frac{18}{3}\ \frac{cm}{m}$

Simplify

The new scale is $6\ \frac{cm}{m}$

That means ---> 6 cm in the drawing represent 1 meter in the actual

therefore

the new dimensions of the scale drawing in the attached figure

8 0

4 years ago