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____ [38]
3 years ago
5

Solve by substitution please??? Immediate help!

Mathematics
1 answer:
marta [7]3 years ago
3 0
Solve for the first variable in one of the equations, then substitute the result into the other equation.
3. (1/2, -1,2)
4. (2, -4)
You can get step by step at:
https://www.mathpapa.com/algebra-calculator.html
You might be interested in
1. Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 24. How old is each
Andre45 [30]

Answer:

a) Let Kim's age be k, then Kim's sister's age is k/2

k+\frac{k}{2}=24

b) k+\frac{k}{2}=24

1\frac{1}{2}k=24

k=16

\frac{k}{2}=8

Kim's age is 16 while her sister's age is 8.

5 0
3 years ago
Which relation is a function?
xz_007 [3.2K]

Answer:

I see this

"Which relation is a function?

A {(-3,4),(-3,8),(6,8)}

B {(6,4),(-3,8),(6,8)}

C {(-3,4),(3,-8),(3,8)}

D {(-3,4),(3,5),(-3,8)}"

So the answer is none of these.

Please make sure you have the correct problem.

Step-by-step explanation:

A set of points is a function if you have all your x's are different.  That is, all the x's must be distinct. There can be no value of x that appears more than once.

If you look at choice A, this is not a function because the first two points share the same x, which is -3.

Choice B is not a function because the first and last point share the same x, which is 6.

Choice C is not a function because the last two points share the same x, which is 3.

Choice D is not a function because the first and last choice share the same x, which is -3.

None of your choices show a function.

If you don't have that choice you might want to verify you written the problem correctly.

This is what I see:

"Which relation is a function?

A {(-3,4),(-3,8),(6,8)}

B {(6,4),(-3,8),(6,8)}

C {(-3,4),(3,-8),(3,8)}

D {(-3,4),(3,5),(-3,8)}"

7 0
3 years ago
Can you help please?
lina2011 [118]
-5/2

an example of how to write it is :)

5 0
2 years ago
Read 2 more answers
Students at Jefferson Elementary School made $3,045 selling 210 equally priced boxes of candy. Which is the best estimate for th
Novosadov [1.4K]
3,045 = 210x

3,045/210 = 14.5


A good estimate of the cost would be:

$14.50
4 0
3 years ago
Read 2 more answers
Which of the following best describes the vertical cross-section of the cylinder ?
Nina [5.8K]
The answer would be d
6 0
3 years ago
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