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Ugo [173]
3 years ago
9

How do I simplify the expression 4y-y​

Mathematics
2 answers:
julsineya [31]3 years ago
8 0

Answer:

5y

Step-by-step explanation:

You simply add the y to 4y

Vladimir [108]3 years ago
7 0

Answer:

3y

Step-by-step explanation:

You simplify by subtracting the numbers in the front of the variables. Granted, it would look like there is no number in front of the second y, however, it is implied that there is a 1 in front of it. Subtract the numericals:

4y - 1y = 3y

3y is your answer.

~

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Evaluate <br><br> 0<br> ∫ ( 3^3 - 5^2) dx <br> -2
Jobisdone [24]
3^3 = 27
5^2 = 25
27 - 25 = 2

integral of 2 = 2x

(2x) evaluated from -2 to 0
= (0) - (2(-2)) = -(-4) = 4

If you did not make any mistakes in typing your question
the answer would be 4
4 0
3 years ago
Let f(x) = x2 − 3x − 7. Find f(−3).
MrRa [10]
Answer is:
f(-3) = 11
5 0
3 years ago
Read 2 more answers
Jacob leaves his summer cottage and drives home. After
krok68 [10]

Answer:

A linear relationship can be written as:

y = a*x + b

Where a is the slope and b is the y-intercept.

If this line passes through the points (a, b) and (c, d) then the slope can be written as:

a = (a - c)/(b - d)

Here y will represent the distance between Jacob and his house, and the variable x represents the time that he has ben driving.

In this case, we know that after driving for 5 hours, he is 112km from home.

Then we can write this point as (5h, 112km)

We also know that after 7 hours he is 15km from home.

Then we can write this point as (7h, 15km)

Then the slope of this function will be:

a = (15km - 112km)/(7h - 5h) = -48.5 km/h

Then the equation is:

y = -(48.5 km/h)*x + b

To find the value of b, we can replace the values of one of the points, for example in the point (7h, 15km)

This means that we need to replace x by 12h, and y by 15km, then we get:

15km = -( 48.5 km/h)*7h + b

15km + ( 48.5 km/h)*7h = b = 354.5 km

then the equation will be:

y = (-48.5 km/h)*x + 354.5 km

Now we want to answer: How long had Jacob been driving when he was 209 km from  home?

Then we need to only replace y by 209km, and solve for x:

209km = (-48.5 km/h)*x + 354.5 km

209km - 354.5 km = (-48.5 km/h)*x

-145.5km =  (-48.5 km/h)*x

-145.5km/( -48.5 km/h) = x = 3h

So he is 209km away from his home after driving for 3 hours.

6 0
3 years ago
**25 subtracted from the product of a <br> number and 7 is less than -39.*
riadik2000 [5.3K]

Answer:

7n-25 < -39

Step-by-step explanation:

7 0
2 years ago
Can someone help me with this math problem..?
erma4kov [3.2K]
10x -15y=45
9x+15y= 12

19x= 57
x= 3

3(3)+5y= 4

9 + 5y = 4
5y = -5
y = -1

(3,-1)
6 0
3 years ago
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