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SVETLANKA909090 [29]
3 years ago
6

Solve the following Systems of Equations by Substitution or Elimination

Mathematics
1 answer:
Likurg_2 [28]3 years ago
7 0

Answer:

(-1,2)

Step-by-step explanation:

y = -2x ______(1)

7x - 8y = -23 ________(2)

Substituting the value of y in eqn.(1) into eqn (2);

7x - 8(-2x) = -23

7x + 16x = -23

23x = -23

x = -1

y = -2(-1) = 2.

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Martin finds a shirt on sale for 10% off at a department store. The original price was $20. Martin must also pay 8.5% sales tax.
IRINA_888 [86]

Answer:

The shirt is originally$20 dollars, after the taxes are applied the shirt costs $21.70

Step-by-step explanation:

The question says it cost $20.

20×(8.5÷100)

20×0.0851= 1.7

20+1.7

21.7

4 0
3 years ago
Read 2 more answers
If one point on a horizontal line has the coordinates (10, -3), which of the points below are also on the line? Select all that
frozen [14]
The correct answers are:
______________________________________________________
  [B]:  "  (3, -3)  " ;  AND:
______________________________________________________
  [C]:  " (-2, -3) " .
______________________________________________________ 
<u>
Note</u>:
 Any point with the "y-coordinate" of  "-3" would also be on the line.

As such, the correct answers, are:
______________________________________________________
  [B]:  "  (3, -3)  " ;  AND:
______________________________________________________
  [C]:  " (-2, -3) " .
______________________________________________________ 
6 0
3 years ago
Can someone please help me on this
AleksandrR [38]

Answer:

no

♥have a good day.

3 0
3 years ago
Read 2 more answers
One number exceeds another by 44. the sum of the numbers is 24. what are the​ numbers?
baherus [9]

Let, the numbers = x,y

x+y= 24   1st eqn

x-y = 44   2nd eqn

24-y-y = 44

-2y = 44-24

y = 20/-2 = -10

substitute that in equation 1st x = 24+10 = 34

so, the numbers would be 34 & -10



4 0
3 years ago
Pick the correct answer :)
amm1812
= 3a^2b(cuberoot(b^2)) - 3a^2b^3(square root(3a))

answer is the first choice

4 0
3 years ago
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