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Identify the algebraic description that maps a point (3, 7) onto another point (-5, 7).

ella [17]

Answer:

A) (x, y) → (x - 8, y)

Step-by-step explanation:

(3, 7) → (-5, 7)

Without adding or subtracting any values, we can immediately tell that the y-value did not change, but the x-value did. With this, we are left with choices A and D.

A) (x, y) → (x - 8, y)

(3, 7) → (3 - 8, y)

(3, 7) → (-5, 7)

This matches our problem, and therefore, A is the correct answer.

Hope this helps!

8 0

2 years ago

A college entrance exam company determined that a score of 24 on the mathematics portion of the exam suggests that a student is

seraphim [82]

Answer:

a) The Z -value 2.397 < 2.576 at 99% or 0.01% level of significance

Null hypothesis is accepted at 0.01% level of significance

They score is above 24 on the math portion of the exam

b)

Null Hypothesis: There is no significance difference between the college level mathematics and math courses in high school

H₀: μ = 24

Alternative Hypothesis: H₁: μ ≠ 24

Step-by-step explanation:

Step(i):-

Given random sample 'n' = 250

Given data sample mean x⁻ = 24.5

Standard deviation = 3.3

Null Hypothesis: There is no significance difference between the college level mathematics and math courses in high school

H₀: μ = 24

Alternative Hypothesis: H₁: μ ≠ 24

test statistic

$Z = \frac{x^{-} - mean}{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{24.5 - 24}{\frac{3.3}{\sqrt{250} } } = \frac{0.5}{0.2087} = 2.397$

a) 99% or 0.01% level of significance

Level of significance ∝ = 0.01

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.005} =2.576$

The Z -value 2.397 < 2.576 at 99% or 0.01% level of significance

Null hypothesis is accepted at 0.01% level of significance

They score is above 24 on the math portion of the exam

b) 95% or 0.05% level of significance

Level of significance ∝ = 0.05

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.05}{2} } = Z_{0.025} = 1.96$

The Z -value 2.397 > 1.96 at 95% or 0.05% level of significance

Null hypothesis is Rejected at 0.05% level of significance

They score is below 24 on the math portion of the exam

6 0

3 years ago

the function F(x) represents the monthly earnings of sales executive, which consists of a base salary and a comission earned on

Rasek [7]

Since, the function F(x) represents the monthly earnings of sales executive, which consists of a base salary and a commission earned on each scale, where 'x' is the number of sales.

So, the function F(x) can be expressed as:

F(x)= base salary+ commission earned on each sale (x) where 'x' represents the number of sales done.

So, F(0)= base salary + 0 ( As x=0 implies there was no sale)

And the executive earned only his base salary and no commission as he did not make any sale, and the commission was dependent upon the number of sales (x).

Hence, F(0) represents the base salary.

So, Option J is the correct answer.

4 0

3 years ago

If n=4, the value of the expression 28-12 + Vn 2 is 15 17 21 helpppppppp

ollegr [7]

Answer:

17

Step-by-step explanation:

3 0

3 years ago

From the beginning of the day the temperature rose 15° so that by 4 pm it was 87°. What was the temperature at the start of the

zubka84 [21]

Your answer is A, 72°.

4 0

4 years ago

Read 2 more answers

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