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natta225 [31]
3 years ago
14

use the substitution method to solve the system of equations . choose the correct ordered pairs x+y=5 y=7 A.(12,7) B.(-12,7) C.

(-2,7) D.(2,7)
Mathematics
1 answer:
Alex3 years ago
4 0

Answer:

<em>C. (-2, 7)</em>

Step-by-step explanation:

Put y = 7 to the equation x + y = 5:

x + 7 = 5          <em>subtract 7 from both sides</em>

x = -2


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Today is Wednesday. What day of the week is 80 days from today?<br><br> SHOW WORKKK
Arlecino [84]

Answer:

Saturday

Step-by-step explanation:

Each 7 days brings you back to the original day

80/7=11R3

Wednesday+3= Saturday

7 0
3 years ago
Read 2 more answers
Multiply and simplify the product. 2i(4 – 5i) select the product. –2i 2i –10 8i 10 8i
Crazy boy [7]

The multiplication of the expressions 2i and (4 – 5i) is 10 + 8i. Then the correct option is D.

<h3>What is multiplication?</h3>

It is also known as the product. If the object n is given to m times then we just simply multiply them.

The expressions are 2i and (4 – 5i).

Then the product of the expression will be given as

2i (4 – 5i)

8i – 10i²

And we know that i² = -1

Then we have

8i – 10 (–1)

10 + 8i

More about the multiplication link is given below.

brainly.com/question/19943359

4 0
2 years ago
Each morning a deli worker has to make several pies and a bucket of potatoes. On Monday, it took the worker 2 hours to make the
Gala2k [10]

The quantities include hours and minutes.

The the known and unknown quantities can be used to write an equation and this gives 60 minutes.

<h3>How to explain the information?</h3>

It should be noted that there are two different units of time measurement and these are hours and minutes. In this case, once can either convert the hours given to minutes or vice versa.

Therefore,

2 hours = 120 minutes, and

2.5 hours = 150 minutes.

If x represents the number of potatoes in the bucket, then the time to peel all of the potatoes on the first day will be 1.5x.

The quantity added to the 120 minutes spent making pies is the total elapsed time for the first day's work. The first days time is equal to the second day. This will be:

120 + 1.5x = 150 + x

1.5x - x = 150 - 120

0.5x = 30

x = 30/0.5 = 60

The time taken is 60 minutes.

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6 0
1 year ago
Identify the quadratic term in the function f(x)=2x^2-3x+5
Leviafan [203]
The quadratic term is 2x^2.
7 0
3 years ago
Find the total surface area of this cone.<br> leave your answer in terms of pi<br> R=3<br> L=4
Yuliya22 [10]

Answer:

total surface area of cone is πr (r+l)

22/7 x 3 (3+4)

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22 x 3 ( as 7 that was divided by 22 was cut out with 7 in the bracket)

hence,

TSA of cone = 66pi

8 0
3 years ago
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