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3 years ago

Does anyone know what this could be ??

Mathematics

1 answer:

Rzqust [24]3 years ago

3 0

Answer:

The answer is f(-3)= -2(-3)+4

Step-by-step explanation:

you just switch x with -3 because you know the unknown variable now.

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Help these problems lol alll of them

Ratling [72]

Answer:

1) 18

2) Tuesday, Thursday, Saturday

3) Weeks 2 and 4

7 0

2 years ago

Mary makes trait mix with bulk nuts and dried fruit. She spends on the dried fruit Mixed nuts cost $2.50 per pound. She has a to

malfutka [58]

Answer:

4 pounds

Step by Step Explaintion

5 0

2 years ago

Which expression is equivalent to the expression below?<br><br> 2.1 + (–3.7h) + 1.9h – 1.4

PtichkaEL [24]

Answer:

Idk if this is an option but 0.7-1.8h

Step-by-step explanation:

In this equation, to simplify, you can add like terms. You would do 2.1-1.4 and (-3.7h)+1.9h. When you do the math, you get 0.7-1.8h. Always look out for like terms! Hope this Helps!

6 0

3 years ago

A statistics practitioner in a large university is investigating the factors that affect salary of professors. He wondered if ev

Ulleksa [173]

Answer:

Step-by-step explanation:

Hello!

Given the linear regression of Y: "Annual salary" as a function of X: "Mean score on teaching evaluation" of a population of university professors. It is desired to study whether student evaluations are related to salaries.

The population equation line is

E(Y)= β₀ + β₁X

Using the information of a n= 100 sample, the following data was calculated:

R²= 0.23

Coefficient Standard Error

Intercept 25675.5 11393

x 5321 2119

The estimated equation is

^Y= 25675.5 + 5321X

Now if the interest is to test if the teaching evaluation affects the proffesor's annual salary, the hypotheses are:

H₀: β = 0

H₁: β ≠ 0

There are two statistic you can use to make this test, a Student's t or an ANOVA F.

Since you have information about the estimation of β you can calculate the two tailed t test using the formula:

$t= \frac{b - \beta }{\frac{Sb}{\sqrt{n} } }$ ~ $t_{n-2}$

$t= \frac{ 5321 - 0 }{\frac{2119}{\sqrt{100} } }$ = 25.1109

The p-value is two-tailed, and is the probability of getting a value as extreme as the calculated $t_{H_0}$ under the distribution $t_{98}$

p-value < 0.00001

I hope it helps!

3 0

2 years ago

O preço do diesel sofreu três alterações ao longo do último trimestre de 2017. A primeira alteração foi em outubro, cujo aumento

EleoNora [17]

Answer:

47.84%

Step-by-step explanation:

The easiest method to solve this exercise is to assume that the starting diesel price is 100 reais.

Now we will calculate each increase with our assumption:

1. Initial price plus 10% increase, therefore:

100 + 100 * 0.1 = 110 reais

2. Additional 20% increase in relation to 110 reais:

110 + 110 * 0.2 = 132 reais

3. Additional 12% increase in relation to 132 reais:

132 + 132 * 0.12 = 147.84 reais.

What it means is that the price would be 147.84 reais.

Since our assumption is 100, we can know that there was an increase of almost 47.84% in relation to the initial price that we assumed at the beginning.

5 0

3 years ago