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Over [174]
3 years ago
13

A system of equations is shown below: Equation A: 4c = d – 8 Equation B: c = 5d + 8 Which of the following steps should be perfo

rmed to eliminate variable d first?
a. Multiply equation B by 4.
b. Multiply equation A by –5.
c. Multiply equation A by 4.
d. Multiply equation B by 5.
Mathematics
2 answers:
ozzi3 years ago
8 0
You would want to multiply equation a by -5 so you can eliminate by addition
Doss [256]3 years ago
6 0
B is the correct answer... Hope I'd helped!
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Determine an interest rate less than 15%, a period of investment greater than two years, and a regular payment that will result
Alborosie
13%, 5 years, 2500 could most likely maybe be the answer a question
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3 years ago
If point A is located at (5,-7) and there are 8 points between A and B, what could be the possible coordinates for point B?
aleksandr82 [10.1K]

Answer: The possible cordinates (X,Y) of B can be found with the formula Y = √(8^2 - (X- 5)^2) - 7 where  -3 ≤ X ≤ 13

Step-by-step explanation:

The point A is located at (5, -7)

And we know that we have 8 units of difference between A and B.

The equation of a circle centerd in the point (x0, y0) is:

(x - x0)^2 + (y - y0)^2 = r2

where r is the radius of the circle

So we can draw a circle of 8 units around A, and get:

(X - 5)^2 + (Y - (-7))^2 = 8^2

So from this equation we can find all the possible values of B, for this we can isolate one of the variables in one side and get a function.

Y = √(8^2 - (X- 5)^2) - 7

So for a given value of X, you can find the value of Y. where you need to remember that (8^2 - (X-5)^2) can not be a negative number, so we must have that:

8^2 ≥ (X - 5)^2

So X can go from -3 (because (-3 - 5)^2 = 8^2)

to X = 13 (because (13 - 5)^2 = 8^2)

So X is in the range {-3, 13}

4 0
3 years ago
Read 2 more answers
When a number is divided by 5 the answer is 3 remainder 4, what is that number?
skelet666 [1.2K]

We know that 5 fits entirely into our number three times, and then there's a remainder of 4.

If 5 fits three times exactly, it means that our number is at least 15 (5x3).

From here, we have a remainder of 4, which leads to 15+4=19

5 0
3 years ago
I will mark brainliest
yulyashka [42]
Angles a and e! they’re alternate interior angles, therefore they are congruent.
8 0
2 years ago
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