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kifflom [539]
3 years ago
13

If a = 5 and b = 6, evaluate the following expression: 20 - 5a + 3b

Mathematics
1 answer:
aliya0001 [1]3 years ago
6 0

Answer:

20-5 × 5 + 3 × 6

20-25 + 36

Step-by-step explanation:

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3 0
3 years ago
Read 2 more answers
 what is perpendicular to y= 3x -9 and passes through the point (3,1)
GREYUIT [131]
(3,1) , \ \ y= 3x -9 \\ \\ The \ slope \ is :m _{1} =3 \\ \\ If \ m_{1} \ and \ m _{2} \ are \ the \ gradients \ of \ two \ perpendicular \\ \\ lines \ we \ have \ m _{1} \cdot m _{2} = -1 \\ \\3\cdot m_{2}=-1 \ \ /:3\\ \\ m_{2}=-\frac{1}{3}

\Now \ your \ equation \ of \ line \ passing \ through \ (3,1) would \ be: \\ \\ y=m_{2}x+b \\ \\1=-\frac{1}{ 3} \cdot3 + b

1=-1+b\\ \\ b=1+1\\ \\b=2 \\ \\ y =- \frac{1}{3}x+2


6 0
3 years ago
Can someone please help me Thanks!!
Delvig [45]

Answer:

I Believe it is the first two

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
No chi-square The principal in Exercise 7 also
larisa [96]

The random sample of the students is an illustration of sampling

The chi-square test for goodness of fit is inappropriate because the variable under study is not categorical.

<h3>How to determine the reason chi square is not appropriate?</h3>

The dataset is given as:

Monday        34

Tuesday       29

Wednesday   32

Thursday        28

Friday             19

The variable of the above dataset is a not a categorical dataset.

One of the conditions of the chi-square test for goodness of fit test is that the variable under study must be categorical.

Hence, the chi-square test for goodness of fit is inappropriate because the variable under study is not categorical.

Read more about chi-square test at:

brainly.com/question/19959558

8 0
2 years ago
X - 150 = y<br> x - y = 50<br> x + y = 180<br> x = y + 60<br> what is x?
Murrr4er [49]
It is y=x-150 because x−150+150=y+150
4 0
3 years ago
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