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stepan [7]
3 years ago
5

Rafael counted a total of 40 white cars and yellow.There were 9 times as many white cars as yellow cars how many white cars did

Rafael count
Mathematics
1 answer:
Naily [24]3 years ago
6 0
Well 9x40 would be the solution, so what is 9x40? That will be your answer.
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The linear function f(x) = 0.9x + 79 represents the average test score in your math class, where x is the number of the test tak
Levart [38]

Given:

The linear function for average test score in your math class is

f(x)=0.9x+79

where x is the number of the test taken.

The linear function g(x) in the given table represents the average test score in your science class, where x is the number of the test taken.

To find:

Part A: The test average for your math class after completing test 2.

Part B: The test average for your science class after completing test 2.

Part C: Which class had a higher average after completing test 4?

Solution:

Part A:

We have,

f(x)=0.9x+79

Put x=2 in the above function, to find the test average for your math class after completing test 2.

f(2)=0.9(2)+79

f(2)=1.8+79

f(2)=80.8

Therefore, the test average for your math class after completing test 2 is 80.8.

Part B:

From the given table it is clear that g(x) =79 at x=2.

Therefore, the test average for your science class after completing test 2 is 79.

Part C:

Put x=4 in f(x), to find the test average for your math class after completing test 4.

f(4)=0.9(4)+79

f(4)=3.6+79

f(4)=82.6

From the table it is clear that the value of g(x) is increased by 1 as x is increased by 1. So, the value of function g(x) at x=4 must be 1 more than 80.

g(4)=81

It is clear that,

82.6>81

Therefore, math class had a higher average after completing test 4.

3 0
3 years ago
A portion of the Quadratic Formula proof is shown. Fill in the missing reason
Dahasolnce [82]

Answer:

The first one

Step-by-step explanation:

I believe it is the first option, as you can see that, on the right hand side, 4a was multiplied to the first term to make a common denominator. I'm sorry if it is wrong, and I hope this helped.

5 0
3 years ago
Read 2 more answers
What is the line of symmetry for the parabola whose equation is y = 3x2 + 24x - 1?
meriva
Hello :
<span>y = 3x2 + 24x - 1
   = 3(x²+8x) -1
   = 3 (x² +2(4)(x) +4²- 4² ) -1
   = 3((x+4)² -16)-1
y = 3(x+4)² - 49
</span><span>the line of symmetry is : x= - 4</span>
8 0
3 years ago
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Find the slope of the line going through the points (-5,-7) and (0,13)
Gre4nikov [31]

Answer:

slope=  4

Step-by-step explanation:

rise=20 run= 5    divide =4

6 0
3 years ago
(3x+6) 2 is subtracted from 9?
vovikov84 [41]
Where did the 9 and 2 come from
3 0
3 years ago
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