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3 years ago

Solve using elimination. 8x + y = -6 5x – y = -20 do i eliminate the Y's first?

Mathematics

2 answers:

trapecia [35]3 years ago

4 0

I think you eliminate the x's first because that's the only way you can solve

Usimov [2.4K]3 years ago

4 0

Yes, because since y plus -y would equal 0, the y's would cancel out

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In the formula that gives the circumference of a circle, which quantity is multiplied by 21 ?

zloy xaker [14]

Answer:

Radius

Step-by-step explanation:

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3 years ago

During her first year of college, Sara put $2000 in the bank to save for a trip to Italy after graduation. The money earned 3% s

vodomira [7]

Answer:

Sara will have US$ 2,251.02 in the bank after 4 years for her trip to Italy.

Step-by-step explanation:

1. Let's review the data given to us for solving the question:

Investment of Sara during her 1st year of college = US$ 2,000

Duration of the investment = 4 years

Annual interest rate = 3%

2. Let's find the future value of this investment after 4 years, using the following formula:

FV = PV * (1 + r) ⁿ

PV = Investment of Sara during her 1st year of college = US$ 2,000

number of periods (n) = 4

rate (r) = 3% = 0.03

Replacing with the real values, we have:

FV = 2,000 * (1 + 0.03) ⁴

FV = 2,000 * (1.03) ⁴

FV = 2,000 * 1.12550881

FV = 2,251.02

Sara will have US$ 2,251.02 in the bank after 4 years for her trip to Italy.

7 0

3 years ago

Read 2 more answers

What must be added to -31 to get 12

konstantin123 [22]

Answer:

Step-by-step explanation:

31+12=43

Therefore adding 43 to -31 should give the answer 12.

3 0

2 years ago

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Hey there I need some assistance need on this problem. What do I mean by checkpoints and how am I supposed to find the y-interce

MakcuM [25]

Slope Formula: y2 - y1 / x2 - x1

(m and slope represent the same quantity)

m = 1 - - 5 / -4 - 0

m = 1 + 5 / -4

m = 6 / -4

m = -3/2

Now that we know the slope, we can plug the slope and one of our points into slope-intercept form (y = mx + b) and solve for b. I will be using the point (-4,1).

y = -3/2x + b

1 = -3/2(-4) + b

1 = 6 + b

b = -5

In point form, the y-intercept is (0, -5).

Therefore, to get the equation all we need to do is plug in our slope and b-value to slope-intercept form.

Equation: y = -3/2 x - 5

To check the point (-6, -14) we plug it into our equation and see if the two sides are equal.

-14 = -3/2(-6) - 5

-14 = 9 - 5

-14 = 4

-14 does not equal 4, therefore the point is NOT on the line.

Hope this helps!

6 0

3 years ago

Can you please help me

PSYCHO15rus [73]

Answer:

its the last one

Step-by-step explanation:

4 0

3 years ago

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