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user100 [1]
3 years ago
13

Find the solution for the system of linear equations by elimination: 2x+y=9,3x-y=16

Mathematics
2 answers:
Mademuasel [1]3 years ago
5 0
The answer to the question is (-5,-1)
alexandr402 [8]3 years ago
3 0

Answer:

(-5,-1)

Step-by-step explanation:

2x+y=9 -> y=-2x+9

3x-y=16

3x-(-2x+9)=16

3x+2x-9=16

5x-9=16

5x-9 (+9)=16 (+9)

5x=25

x=5

no plug in 5 to x in any equation above

2(5)+y=9

10+y (-10)=9 (-10)

y=-1

so the answer is (-5,-1)

hope it's correct! and hope i helped

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Select the correct answer.
iris [78.8K]

The future value of $1,000 invested at 8% compounded semiannually for five years is \bold{\$ 1,480}

<u>Solution:</u>

\bold{A = P (1 + i )^{n}} ----------- equation 1

A = future value  

P= principal amount  

i = interest rate

n = number of times money is compounded  

P = 1000

i = 8 %

\mathrm{n} = \text { compounding period } \times \text {number of years}

(Compounding period for semi annually = 2)

\mathrm{n} = \text { compounding period } \times \text {number of years}

Dividing “i” by compounding period

i = \frac{8 \%}{2} = 0.04

Solving for future value using equation 1

\begin{array}{l}{A = 1000(1 + 0.04)^{10}} \\\\ {=1000 (1.04)^{10}}\end{array}

= 1480.2

\approx 1,480 \$

3 0
3 years ago
Martha's weight is 75kg. Her weight increased by 3%. What is her new weight?
Brums [2.3K]
Martha’s new weight is 77.25. 3% of 75 is 2.25 and you can find that by multiplying 75 by .03 and adding that number to 75. hope this helps!
3 0
3 years ago
Read 2 more answers
A flashlight has 7 batteries, 5 of which are defective. If 5 are selected at random without replacement, find the probability th
TEA [102]
71.4 % chance I think is your answer. 
8 0
3 years ago
HELP?
poizon [28]
My "work" is to enter the equations into a graphing calculator and let it show me the answers--just as your "work" is to copy the question to Brainly.

The solutions are
  (x, y) = (-0.5, 7.5)
  (x, y) = (3, 25)

_____
When you equate the expressions for y, you get the quadratic
  2x² -5x -3 = 0
  (2x +1)(x -3) = 0
  x = -1/2 or 3
  y = 5(x +2) = 15/2 or 25

4 0
3 years ago
What is the slope of the line described by the equation below? Y-7=8(x-14
WINSTONCH [101]

Answer: 8 is the slope


Step-by-step explanation:

Y-7=8(x-14)

Y-7= 8x-112

Y= 8x -105


3 0
3 years ago
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