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Kitty [74]
3 years ago
7

OER type of question.

Mathematics
1 answer:
Vlad1618 [11]3 years ago
5 0

Answer:

x=-3, y=-19

Step-by-step explanation:

we can solve by substitution.

y = 2x-1 we can derive from the second equation.

plugging it into the first equation, 2x -3(2x-1) = 15.

simplying, 2x-6x+3 = 15 --> -4x+3 = 15, -4x = 12, x = -3.

now we know x, so we can solve for y by plugging it into one of the equations. --> -3*-6+y = -1

simplify, 18+y = -1 --> y = -19.

You might be interested in
.
Helen [10]

Answer:

36 Days!

Step-by-step explanation:

So A barrel contained 60 gallons of water. Water leaked out of the barrel at a rate of 5 gallons every 3 days. The question is “At this rate, how many days did it take for all 60 gallons of water to leak out of the barrel”? So What I did to find this out is multiplyed 3 by 12 to get 36 days. But When I was doing that I was also paying attention to that 5 gallons of water leak out of the barrel in 3 days, that’s why I multiplyed by 3.

If this doesn’t make sense to you I could explain it better if you need more explanation.

Hope This Helps!

-TheAnimeCatUwU

#LearnWithBrainly

6 0
3 years ago
1. Write the postulate that confirms each statement. ​
valina [46]

Answer:

Three dots are all on one piece of paper. Through any three non-collier points there is exactly one plane containing them. Two basketballs form a line.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Callie wants to buy a new pair of jeans that reguiarly
Molodets [167]
A: 49.50


Explanation: 10% of 50 is 5, and 5 dollars off of 50 is 45. The ten percent tax would be 4.50 cents, making it 49.50

Please give brainliest if it helped!
4 0
3 years ago
Read 2 more answers
I Need The Answer Plz!!! Geometry Is Hard!!
prohojiy [21]

Answer:

12√5

Step-by-step explanation:

According to the attached sketch, there are 2 triangles which we need to focus on, triangle A (in yellow) and triangle B (In red).

If you look at triangle A, we notice that X is the hypotenuse of triangle A. This means that X must be the largest length in triangle A, hence we can say that x must be greater than 24 (or 24 < x)

Now look at triangle B, in this case, they hypotenuse is 30 and x is the length of one of the sides. This means that x must be shorter than the hypotenuse (i.e x < 30)

from the 2 paragraphs above, we can see now that we can assemble an inequality in x

24 < x < 30

If we look at the choices, we can immediately ignore 33 because x must be less than 30,

working out the choices, we find that the only choice which falls into the range 24<x<30 is the 2nd choice 12√5  (= 26.83)  (which is the answer)

The last 2 choices give values smaller than 24 and are hence cannot be the answer

8 0
3 years ago
One car went 10 miles farther when traveling at 50 mph than a second car that traveled 2 hours longer at a speed of 40 mph. How
lesya [120]
<span>times t hours and (t+2) hours) 
d1 = 50 t 
d2 = 40(t+2) 

50 t = 10 + 40(t+2) 

10 t = 90 

t = 9
</span>
5 0
4 years ago
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