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Neporo4naja [7]
3 years ago
9

-5(3-6)=-45 simplified

Mathematics
1 answer:
IgorLugansk [536]3 years ago
6 0

We can use the distributive property for this:

-5(3 - 6) = -45

-15 + 30 = -45

15 = -45.

Soooo that's like the farthest you can simplify... and both sides aren't equal...sooo yeah.

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A committee at the College Board has been asked to study the SAT math scores for students in Pennsylvania and Ohio. A sample of
ozzi

Answer:

Step-by-step explanation:

From the given information:

The null hypothesis and the alternative hypothesis can be computed as:

H_0 :\mu_1 -\mu_2 = 0   (i.e. there is no difference between the SAT score for students in both locations)

H_1 :\mu_1 -\mu_2 \geq0 (i.e. there is a difference between the SAT score for students in both locations)

The test statistics using the students' t-test  for the two-samples; we have:

t = \dfrac{\overline x_1 -\overline x_2}{\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2} } }

t = \dfrac{580 -530}{\sqrt{\dfrac{105^2}{45}+\dfrac{114^2}{38} } }

t = \dfrac{50}{\sqrt{\dfrac{11025}{45}+\dfrac{12996}{38} } }

t = \dfrac{50}{\sqrt{245+342 } }

t = \dfrac{50}{\sqrt{587} }

t = \dfrac{50}{24.228}

t = 2.06

degree of freedom = (n_1 + n_2 ) -2

degree of freedom = (45+38) -2

degree of freedom = 81

Using the level of significance of 0.05

Since the test is two-tailed at the degree of freedom 81 and t = 2.06

The p-value  = 0.0426

Decision rule: To reject H_o  if the p-value is less than the significance level

Conclusion: We reject the H_o , thus, there is no sufficient evidence to conclude that there is a significant difference between the SAT math score for students in Pennsylvania and Ohio.

5 0
3 years ago
Which angle pairs are congruent angle pairs? Select all that apply.
Liono4ka [1.6K]

All are angle pair relationship, except consecutive exterior.

6 0
3 years ago
Solve for k. <br><br><br> 9(3-2x)=2(10-8x)
GrogVix [38]

Answer:

Step-by-step explanation:

9(3−2x)=2(10−8x)

Step 1: Simplify both sides of the equation.

9(3−2x)=2(10−8x)

(9)(3)+(9)(−2x)=(2)(10)+(2)(−8x)(Distribute)

27+−18x=20+−16x

−18x+27=−16x+20

Step 2: Add 16x to both sides.

−18x+27+16x=−16x+20+16x

−2x+27=20

Step 3: Subtract 27 from both sides.

−2x+27−27=20−27

−2x=−7

Step 4: Divide both sides by -2.

−2x −2  =  −7 /−2  

x= 7/ 2

Answer:

x= 7/ 2

3 0
3 years ago
Question: Find Angle S<br><br> SOMEONE PLEASE HELP WILL GIVE BRAINLEST!
fenix001 [56]

Answer: 45

Step-by-step explanation:

S is 45 (labelled on the diagram)

4 0
3 years ago
What is 247039 rounded to the nearest thousand
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That means the thousands number will either be the same or 1 higher based on the hundreds place & everything after the thousands place will be 0s
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