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3 years ago

I need help with this

Mathematics

2 answers:

gregori [183]3 years ago

5 0

Answer:

yes they are congruent.

Step-by-step explanation:

first flip the A-D shape over the y axis and then the x axis and you should have the same shape.

Andreas93 [3]3 years ago

3 0

I believe I learned about this last year, so I may not be perfect at it still, but they should be congruent.

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What fraction of a day is 15 hours

Genrish500 [490]

15/24 = 5/8

15 hours out of 24 hours.!!!!

5/8 of a day, or 0.625 as a decimal.

in minutes, it's 900/1,440

Hope this helps!!!!!

5 0

3 years ago

The measures of 6 of the interior angles of a heptagon are: 120°, 150°, 135°, 170°, 90°, and 125°. What is the measure of the la

Lilit [14]

1. consider one angle of a (convex) heptagon. From that angle you can construct 7-3=4 diagonals. (-3 because we cannot create diagonals with the adjacent vertices and the angle itself )

2. 4 diagonals create 5 triangular regions. (check the picture)

3. So the sum of the measures of the interior angles of the heptagon is 180°*5=900°.

4. The measure of the remaining 7th interior angle is 900°-(120+150+135+170+90+125)°=110°.

5. The largest exterior angle is when the interior angle is the smallest.

6. The smallest interior angle is 90°, so the largest exterior angle is 180°-90°=90°

Answer: 90°

7 0

3 years ago

The function m is given in three equivalent forms. Which form most quickly reveals the vertex

Rufina [12.5K]

Answer:

m (x) = -2(x-6)^2 +18

Step-by-step explanation:

3 0

3 years ago

Pschological tests are often used to determine the hostility levels in people. High scores on the HLT pschological test correspo

algol13

Answer: the correct answer is we are 95% confident that there is no statistically significant difference in the mean treatment methods for hostility.

Step-by-step explanation:

1) Test for the equality of variances in the two groups to choose the appropriate t-test.

H0: σ (1)^2 = σ (2)^2

Ha: σ (1)^2 ≠ σ (2)^2

Larger variance = 64

Smaller variance = 49

F = 1.30612

Degrees of freedom 15 and 9

Critical F from the table (with alpha=0.05) = 2.58

Calculated F is smaller than critical F, so we use the pooled variance t-test.

Sample 1 size 7

Sample 2 size 8

Sample 1 mean 79

Sample 2 mean 84

Sample 1 S.D. 7

Sample 2 S.D. 8

Pooled S.D = [(n1-1)s1^2+(n2-1)s2^2]/(n1+n2-2)

Pooled variance s = [(6)(49)+(7)(64))] / (13) = (294+448)/13=742/13=57.076923

Pooled variance s^2 = 57.076923

Standard error of difference in means = sqrt(1/n1+1/n2) times sqrt(s^2)

Standard error of difference in means = (0.517549)(7.554927) = 3.910046 (denominator of t)

Confidence interval = (mean1-mean2) +/- t SE

t is the critical t with 24 degrees of freedom = 2.056

(79 - 84) +/- (2.056) (3.910046)

= (-13.04, 3.04)

Interval encloses 0

We are 95% confident that there is no statistically significant difference in the mean treatment methods for hostility.

4 0

4 years ago

When 3(2x + 5) is added to 2(2x − 4) the resulting expression is?

velikii [3]

Answer:

10x + 7

Step-by-step explanation:

3(2x + 5) added to 2(2x - 4) is the same as 3(2x +5) + 2(2x - 4)

Remember PEMDAS

P – Parentheses (distribution)

E – Exponents

M – Multiplication

/D – Division (whichever comes first from left to right)

A – Addition

/S – Subtraction (whichever comes first from left to right)

First, we will distribute the left side.

3(2x + 5)

3 * 2x = 6x

3 * 5 = 15

Add them together to get:

6x + 15

6x + 15 + 2(2x - 4)

We must now distribute the right side.

2 * 2x = 4x

2 * -4 = -8

Add them together to get:

4x -8

We now have:

6x + 15 + 4x - 8

<u>Let's combine like terms.</u>

6x and 4x are like terms.

Combine: 6x + 4x = 10x

15 and -8 are like terms.

15 - 8 = 7

Now we have 10x + 7

Since 10 and 7 don't have any GCF, we have our answer.

10x + 7

~ $InLoveWithPugs$

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Math Enthusiast

8 0

3 years ago