All categories

2 years ago

Simplifly the expression: x-3x-(-5x)

Mathematics

1 answer:

s2008m [1.1K]2 years ago

7 0

Answer:

The answer is 3x.

Step-by-step explanation:

I used a calculator

You might be interested in

I need to find the base of a triangle with a height of 8.25 inches. The area is 66 inches squared. Is something wrong with my ma

svetoff [14.1K]

Your answer is correct, don't worry! To check your answer, just plug in the answer you got with the variable you are supposed to find. Multiplying by a half is like dividing by two. So, 16 divided by 2 is 8. 8 multiplied by 8.25 is 66. I'm jealous of your handwriting.. XD

8 0

3 years ago

Read 2 more answers

I have 4 apples and manny take 4 how much do i have

natima [27]

Answer:

Step-by-step explanation: If you have 4 apples and then Manny takes away 4 of you apples you have 0

8 0

3 years ago

Read 2 more answers

Write the number in expanded form 36.13

BabaBlast [244]

There are two ways you can write it:
1. 30 + 6 + (1 × 1/10) + (3 × 1/100)
2. 30 + 6 + 0.1 + 0.03
Either is correct :)

4 0

3 years ago

Read 2 more answers

Translate ABC using the coordinate rule (x,y) -> (x-2, y+4)

Bezzdna [24]

The coordinates of all the vertices:

A = (-7,5)

B = (-5,8)

C = (-2,4)

4 0

3 years ago

Read 2 more answers

It is believed that Lake Tahoe Community College (LTCC) Intermediate Algebra students get less than seven hours of sleep per nig

Kitty [74]

Answer: No , at 0.05 level of significance , we have sufficient evidence to reject the claim that LTCC Intermediate Algebra students get less than seven hours of sleep per night, on average.

Step-by-step explanation:

Let $\mu$ denotes the average hours of sleep per night.

As per given , we have

$H_0:\mu=7\\H_a:\mu$

, since $H_a$ is left-tailed and population standard deviation is unknown, so the test is a left-tailed t -test.

Also , it is given that ,

Sample size : n= 22

Sample mean : $\overline{x}=7.24$

Sample standard deviation : s= 1.93

Test statistic : $t=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}$

i.e. $t=\dfrac{7.24-7}{\dfrac{1.93}{\sqrt{22}}}\approx0.58$

For significance level $\alpha=0.05$ and degree of freedom 21 (df=n-1),

Critical t-value for left-tailed test= $t_{\alpha, df}=t_{0.05,21}=- 1.7207$

Decision : Since the test statistic value (0.58) > critical value 1.7207, it means we are failed to reject the null hypothesis .

[Note : When $|t_{cal}|>|t_{cri}|$ , then we accept the null hypothesis.]

Conclusion: We have sufficient evidence to reject the claim that LTCC Intermediate Algebra students get less than seven hours of sleep per night, on average.

6 0

3 years ago