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olchik [2.2K]
3 years ago
5

The first equation in the system of equations that models this situation is x + y = 70, where x represents the number of 2-point

questions and y represents the number of 4-point questions. What is the other equation in the system? Enter the correct answer in the box. Substitute numerical values in the expression for A, B, and C.​
Mathematics
2 answers:
ziro4ka [17]3 years ago
5 0

Answer: (2x+4y=150) this is right

i

swear

on

my

mama

this

is

correct

my

g

Svetach [21]3 years ago
4 0

Answer:

they were right

Step-by-step explanation:

The first equation represents the number of questions on the test. So, the second equation represents how much the questions are worth.

There are x of the 2-point questions, which have a total value of 2x points.

There are y of the 4-point questions, which have a total value of 4y points.

The test has an overall value of 150 points, so the second equation is 2x + 4y = 150.

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Jeanne thinks that x+x is the same as x•x. Is this true? Why? Why not?
NARA [144]
Generally, x <span>• x is accepted to mean "x times x" or "x multiplied by x"

and x+x means "x plus x" or "x added to x"

let's try by subsituting numbers for them
if we can find one case where the statement "x+x is the same as x</span><span>•x" is false, then it is not true


let's try x=4
x+x=x</span><span>•x
4+4=4</span>•<span>4
8=16
false



so it is not true
(x+x is equal to 2x, so therefor if we were to solve 2x=x</span><span>•x, we would get that it is only true for x=2 and x=0)

it is not always true
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3 years ago
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Please help! It’s fairly easy!
icang [17]

Answer:

see below

Step-by-step explanation:

This would be true if the lines are parallel.  We have no information about the lines, so we cannot assume the lines are parallel, so we cannot use the corresponding angles theorem

8 0
3 years ago
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Please take a look at the picture. Please write your answer with an explanation.
Sophie [7]

Answer:

30

Step-by-step explanation:

= 170 + 15 - 5 (3+16) - 64 + 4

= 170 + 15 - 95 - 64 + 4

= 30

6 0
3 years ago
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Three ingredients A, B, and C are mixed by weight in the ratio of 1:2:3 respectively to make a mixture. How many pounds of ingre
cluponka [151]

Answer:

B. 24

Step-by-step explanation:

just took the quiz and got it right

8 0
3 years ago
Suppose that a household's monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hu
olga nikolaevna [1]

Answer:

I hope that you are doing well, during this weird time; and that this message finds you in a good place.

To get you started on this problem, you will want to think about how to go about graphing this linear function. You want to keep in mind that you want to plot your dependent variable on the y-axis, as it changes with respect to your independent variable (plotted on the x-axis). In this problem, the cost of the water bill depends on the amount of water used, in HCF. So the graph should be plotted with cost on the y-axis, and HCF on the x-axis.

It follows that you are given the coordinates of (16, $48.37) and (22, y2); where y2 represents the cost when using 22 HCF. You are also given the slope of your line (m, in y = mx + b format). You may recall that you can set-up a slope as the change in y over the change in x, or the "rise over the run" [m = (y2-y1) / (x2-x1)]. We can set this problem up, using this equation to solve for y2 (the cost at 22 HCF) algebraically.

So we would set up the problem as 1.65 = (y2-48.37)/(22-16). We then solve by combining like-terms and using inverse operations as follows:  

  1.65 = (y2 - 48.37) / 6

  1.65(6) = y2 - 48.37

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  y2 = $58.27

Step-by-step explanation:

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1 year ago
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