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Leno4ka [110]
3 years ago
13

Solve the system of equations below. 5x-2y=18 3x+3y=15

Mathematics
2 answers:
JulsSmile [24]3 years ago
8 0

Answer:

(4,1)

Step-by-step explanation:

Shalnov [3]3 years ago
4 0

\left\{\begin{array}{ccc}5x-2y=18&|\cdot3\\3x+3y=15&|\cdot2\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}15x-6y=54\\6x+6y=30\end{array}\right}|\text{add both sides of the equations}\\.\qquad21x=84\ \ \ \ |:21\\.\qquad\boxed{x=4}\\\\\text{put the value of x to the second equation}\\\\3(4)+3y=15\\12+3y=15\ \ \ \ |-12\\3y=3\ \ \ \ |:3\\\boxed{y=1}\\\\Answer:\ x=4,\ y=1\to \boxed{B.\ (4,\ 1)}

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Please help me out !!!!
marissa [1.9K]

Answer is A) -1 because it they are parallel then they have the same slope. If the green line has a -1 slope so does the red line

5 0
3 years ago
Korey kept track of the number of miles he ran each week for five weeks. The median number of miles he ran during the five weeks
shepuryov [24]

Answer:

the correct answer would be A. the mean is when you add up all of them and divide it by how many numbers there are which in this case is 5. and the median is the number in the middle, in this case 20, therefore when you add up all numbers in A ,you get 105 and you divide it by 5 which gives you 21. :))

6 0
3 years ago
What’s Distribute -x(5x+2)
MaRussiya [10]

Answer:

-5x^2-2x

Step-by-step explanation:

When distributing, you multiply the term outside the brackets to all the terms in brackets.

If the term outside the bracket is negative, then when distributing/opening the brackets, the signs of the terms changes.

So in this prob. -x would multiply to both +5x and +2

-x*5x+-x*2

∴-5x^2-2x

4 0
3 years ago
Read 2 more answers
There are 6 roses in a vase of 11 flowers. The rest are daisies. What is the ratio of all flowers in the vase to daisies (PICTUR
lara [203]

Answer:

a) 6:5

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5 0
2 years ago
A rabbit population doubles every 4 weeks. There are currently five rabbits in a restricted area. If t represents the time, in w
My name is Ann [436]
First, you have to find how many weeks are in 98 and to do so, you would divide it by 7. which turns out to be 14. If you divide 14 by 4 you'll find that their population will double 3 times, but not 3.5 because it is every 4 full weeks.
The equation will look like this, however, I'm not completely certain about the format. I'm using the formula for exponential growth
P(t)=r(2)^t
I did use t as weeks, but for every 4 weeks. R is the number of rabbits. If we were to input our information, we'd get:
P(3)=5(2)^3
If you work it out, you get 40 rabbits. In 14 weeks, the rabbits will double 3 times, so if we were to just figure it out without using the formula, we could double 5 which is 10, double it again, which is 20, and then double it a third time. which is 40.
6 0
3 years ago
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