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antiseptic1488 [7]
3 years ago
11

2x - y = 5 x + 3y = 7 What is the value of the system determinant? A) 5 B) 6 C) 7

Mathematics
1 answer:
tatiyna3 years ago
7 0

Answer:

I think it is 6

Step-by-step explanation:

2x-y=5x+3y=7

   -3y     -3y

2x-4y=5x=7

-2x     -2x

-4y=3x=7

-4+3=-1=7

7-1=6

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Kyle is renting a jet ski for the day. Below are his two options.
Ira Lisetskai [31]

Hi Lawrence!

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We Know:

Powersports Plus: $30 an hour plus a non-refundable deposit of $50.

Sun & Surf: $20 an hour plus a non-refundable deposit of $80.

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Equation:

x = per hour

y = total

Powersports: 30x + 50 = y

Sun and Surf: 20x + 80 = y

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Solution: (Add the deposit then start adding hourly costs)

Powersports: 80, 110, 140

Sun and Surf: 100, 120, 140

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Answer: After <u>3 hours</u> both companies will cost the same amount of money.

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Hope This Helps :)

3 0
3 years ago
Which example illustrates the distributive property? 4 + 5 = 5 + 4 3(x + 4) = 3x + 12 5 * 1 = 5 4 + (5 + 6) = (4 + 5) + 6
Paul [167]
Just use google look up "distributive property
7 0
3 years ago
Read 2 more answers
Given 2 points (-2,6) and (5,-8) what is the slope, distance, and midpoint
Anastasy [175]
(-2,6) (5,-8)

slope = (y2 - y1) / (x2 - x1)
slope = (-8 - 6) / (5 - (-2) = -14/7 = -2 <==

midpoint = (x1 + x2)/2 , (y1 + y2)/2
m = (-2 + 5)/2 , (6 - 8)/2
m = (3/2, -1) <===

distance = sqrt ((x2 - x1)^2 + (y2 - y1)^2)
d = sqrt ((5 - (-2)^2 + (-8 - 6)^2)
d = sqrt ((5 + 2)^2 + (-14^2))
d = sqrt (7^2 + 14^2)
d = sqrt (49 + 196)
d = sqrt 245
d = 15.65 <==
5 0
3 years ago
A line with a slope of -1/3 passes through the point (9,3). What is its equation in point-slope form?
amm1812

The point-slope form:

y-y_1=m(x-x_1)

We have:

(9,\ 3)\to x_1=9,\ y_1=3\\\\m=-\dfrac{1}{3}

Substitute

y-3=-\dfrac{1}{3}(x-9)

7 0
3 years ago
The hawks soccer team won 12 out of 14 games. If this rate continues, how many games will they win if they play a total of 21 ga
Schach [20]
1) 12 out of 14 = 85% Win Rate
2) Now you have to figure out what is 85% of 21 so you have to plug in what you have ? out of 21 = .85
3) Multiply 21 x .85 
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8 0
3 years ago
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