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Alchen [17]
3 years ago
12

In predicting test score by hours spent studying, Y with logical and on top equals 6 x plus 40. This means that for every hour s

tudied, your test score should increase by ________ points.
Mathematics
1 answer:
Musya8 [376]3 years ago
3 0
6 points. Since it’s 6x.
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Determine whether the ordered pair (3,2) is a solution to 5x-3y=9 fastttt pleaseeee
Cerrena [4.2K]

Answer:

YES

Step-by-step explanation:

just replace x=3, y=2

5.3 - 3.2 = 15 - 6 = 9

so it is a solution

4 0
2 years ago
Tried to measure it out didn’t do it right, help?
sweet [91]
A supplementary angle measures 180 degrees, therefore 180-65 is equal to 115 degrees
8 0
3 years ago
Twice the first number is eleven more than the sum of the other two numbers. The sum of twice the first number and three times t
lidiya [134]
Well first you have to make variables for each number.
1st - x
2nd - y
3rd - z

first sentence says twice first number so 2x. is means equals so =. eleven more than sum of the other two numbers. sum of other two numbers is (y + z) and eleven more than that is (y + z) + 11. So so this sentence says:
2x = (y + z) + 11

second sentence says sum of twice the first and three times third. twice first is 2x and three times third is 3z. their sum would be (2x + 3z). It it says is one more than second number. So = (y + 1). So so this means:
(2x + 3z) = (y + 1)

third sentence says second number (y) is is equal to sum of first and third (x + z). so;
y = (x + z)

now for the work.

We we can easily solve for a by subtracting the first 2 equations. the way to subtract 2 equations is by subtracting one left side of equal sign from the other equations left side and then doing the same with the right side.

So we will subtract the 1st and second equations we made.
So so left sides would be
2x - (2x + 3z)
2x - 2x - 3z
-3z

right side would be:
y + z + 11 - (y + 1)
y + z + 11 - y - 1
z + 10

now put the sides with an equal sign
-3z = z + 10
-4z = 10
z = -2.5

now we can plug in z into the equations and subtract second and third equations. But but we will subtract opposite sides. So so left minus right and right mi is left after we plug in z:
(2x + 3 (-2.5)) - (x + (-2.5))
2x - 7.5 - x + 2.5
x - 5

other one would be
(y + 1) - y
1

So so put an equal sign and get:
x - 5 = 1
x = 6

now plug x and x into 3rd equation
y = x + z
y = 6 + (-2.5)
y = 3.5

now we have values. You can check answer by plugging values into other 2 equations
6 0
3 years ago
The Formula for the Area of a Triangle<br> is: =1/2ℎ. <br> Solve for .
rosijanka [135]

Answer:

But there is no question. And the formula for the area of a triangle is 1/2bh not 1/2h.

Thank you.

6 0
2 years ago
This is really easy! pic below..
KATRIN_1 [288]
The answer is A.
I think so because each one of them agrees with 20x and 15
5 0
2 years ago
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