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2 years ago

Which correctly combines like terms in the following expression? (8th Math Middle School)

Mathematics

1 answer:

fiasKO [112]2 years ago

4 0

Answer:

The answer you are looking for is 2x^+2x-5

Step-by-step explanation:

You just combine them

Mark brainliest pls :)

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Using traditional methods, it takes 98 hours to receive a basic driving license. A new license training method using Computer Ai

Rashid [163]

Answer:

Step-by-step explanation:

We would set up the hypothesis test.

For the null hypothesis,

µ = 98

For the alternative hypothesis,

µ ≠ 98

This is a 2 tailed test.

Since no population standard deviation is given, the distribution is a student's t.

Since n = 270

Degrees of freedom, df = n - 1 = 270 - 1 = 269

t = (x - µ)/(s/√n)

Where

x = sample mean = 97

µ = population mean = 98

s = samples standard deviation = 7

t = (97 - 98)/(7/√270) = - 2.35

We would determine the p value using the t test calculator. It becomes

p = 0.02

Since alpha, 0.1 > than the p value, 0.02, then we would reject the null hypothesis. Therefore, At a 10% level of significance, there sufficient evidence to support the claim that the technique performs differently than the traditional method.

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3 years ago

A polling organization contacts 1657 undergraduates who attend a university and live in the United States and asks whether or no

Dimas [21]

Step-by-step explanation:

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3 years ago

An equivalent fraction for 10/14 is _____.

Ira Lisetskai [31]

$\dfrac{10}{14}=\dfrac{10:2}{14:2}=\dfrac{5}{7}\\\\\dfrac{10}{14}=\dfrac{10\cdot2}{14\cdot2}=\dfrac{20}{28}\\\\\dfrac{10}{14}=\dfrac{10\cdot3}{14\cdot3}=\dfrac{30}{42}\\\\\dfrac{10}{14}=\dfrac{5}{7}=\dfrac{5\cdot5}{7\cdot5}=\dfrac{25}{35}\\\vdots$

6 0

3 years ago

Read 2 more answers

Will mark brainliest

Cerrena [4.2K]

Answer:

see explanation

Step-by-step explanation:

The Remainder theorem states that if f(x) is divided by (x - h) then

f(h) is the remainder, thus

division by (x - 1) then h = 1

f(1) = 4(1)³ - 7(1)² - 2(1) + 6

= 4 - 7 - 2 + 6 = 1 ← remainder

The factor theorem states that if (x - h) is a factor of f(x), then f(h) = 0

Here f(1) = 1

Hence (x - 1) is not a factor of f(x)

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3 years ago

Quadrilateral A has side lengths 6, 9, 9, and 12. Quadrilateral B is a scaled copy of Quadrilateral A, with its shortest side of

Varvara68 [4.7K]

Answer:

The answer is below

Step-by-step explanation:

Transformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, translation, rotation and dilation.

Dilation is the increase or decrease in size of a figure. If a figure with point A(x, y) is dilated by a scale factor of k, the new location is at A'(kx, ky). If k > 1, it is an enlargement and if k < 1, it is a reduction.

a) The scale factor from Quadrilateral A to Quadrilateral B = smallest side length of side B / smallest side length of side A = 2 / 6 = 1/3

Scale factor = 1/4= 1 / 3

The side length of 6 in A corresponds to a side length of 2 in B

Side length of B that corresponds with side length of 9 in A = scale factor * 9 = 1/3 * 9 = 3

The side length of 9 in A corresponds to a side length of 3 in B

Side length of B that corresponds with side length of 12 in A = scale factor * 9 = 1/3 * 12 = 4

The side length of 12 in A corresponds to a side length of 4 in B.

c) perimeter of Quadrilateral B = sum of side lengths of quadrilateral B = 2 + 3 + 3 + 4 = 12 units

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3 years ago