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TiliK225 [7]
4 years ago
11

F(x)=x^2-3x. what is the value of f(-8).-I need help with the first step-

Mathematics
1 answer:
Andrei [34K]4 years ago
6 0
This is super easy simply plug -8 into all the x's 

<span>F(x)=x^2-3x.
-8^2 - 3(-8) 
= 64 - 24 
= 40</span>
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Simplify -3/5x+1/2x and explain how you got it please
Licemer1 [7]

Answer:

-(1/10)x

Step-by-step explanation:

This is an addition problem.  Since the variable (x) is the same in both terms, we need only sum up the coefficients -3/5 and 1/2 and then multiply x by this sum.

-3/5x+1/2x = (-3/5 + 1/2)x

The LCD of -3/5 and 1/2 is 10.  The -3/5 term converts to -6/10 and the 1/2 term to 5/10.  Thus, we have (-6/10 + 5/10)x = -(1/10)x

8 0
4 years ago
It is believed that students who begin studying for final exams a week before the test score differently than students who wait
olga55 [171]

Answer:

H0 : μ1 = μ2

H0 : μ1 < μ2

Step-by-step explanation:

Given :

Early studiers, group 1, mean μ1

Late studiers, group 2 ; mean, μ2

To test the claim that students who study earlier have an average score that is less than the average score for students

The null hypothesis ; there is no difference in average score

H0 : μ1 = μ2

Alternative hypothesis is early studiers means is less than average score of late studiers

H0 : μ1 < μ2

7 0
3 years ago
a band that will be the opening act for a concert charges a $700.00 flat fee as well as 16% of all ticket profits from ticket sa
Fofino [41]
The band earned $1,200.

1. Subtract the flat fee 1,200-700 =500
2. 500 is what just the band made. Divide that by .16 (16%) to get the total ticket amount... 500 divided by .16 = 3,125

The total ticket amount was $3,125.
5 0
3 years ago
Please find the perpendicular line slope equation please! Thanks!
lana66690 [7]

We need to convert this equation to slope-intercept form first.

We can do that by solving for y.

x - 5y = 15

<em><u>Add 5y to both sides.</u></em>

x = 5y + 15

<em><u>Subtract 15 from both sides.</u></em>

x - 15 = 5y

<em><u>Divide both sides by 5.</u></em>

y = 1/5x - 3

We now know the slope is 1/5.

The slope of the line perpendicular to the line with a slope of 1/5 is -5.

The slope of a perpendicular line is the negative reciprocal of the original slope.

Using a graphing calculator, we know the y-intercept of the line that is perpendicular to the original line must have a y-intercept of -6 to run through the points (-2, 5).

The equation of the new line is y = -5x - 6.


5 0
3 years ago
Read 2 more answers
The table below shows the number ofpennies, nickels, dimes, and quarters that heather has in her purse. What is the ratio of dim
Margaret [11]
Using the table, you are looking at a ratio of 9 Dimes to 6 nickels or 9:6 which can be simplified by dividing each by three (a number they are both divisible by without going into decimals) to get a ratio of 3 dimes for every 2 nickels she has, or 3:2
8 0
3 years ago
Read 2 more answers
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