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Delvig [45]
2 years ago
6

Find the value of this expression if x = 4 and y = -2. ху/5

Mathematics
1 answer:
slavikrds [6]2 years ago
8 0

Answer:

-1.6

Step-by-step explanation:

4x-2/5

=-8/5

=-1.6

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What are the factors of expression (y-3)(x+7)
torisob [31]
That is easy!! :)
y=3 and x=-7

When you find the factors of something like this, you have to just get the letter alone.

For example: y-3. You have to first write it as y-3=0, then you add 3 from BOTH sides of the = so that you can make the -3 go away and y will be alone. So, it will look like this: y-3+3=0+3. Then, you solve it for y (which just means that you want y by itself on one side of the = ). So, -3+3=0, which means they disappear from that side; since 0+3=3, that's what that side turns into, so what you end up with is y=3

Same thing goes for the x+7 equation:
x+7=0
x+7-7=0-7
x=-7
4 0
3 years ago
can someone please tell me how to do 2x=3y and 4x-3y=12 using substitution to solve the system of equations.
maw [93]

Answer:

Step-by-step explanation:

you divide the two to the y, which is x=3/2y

then, you simplify the second equation to y, which is -3y= -4x+12

then, you substitute the x=3/2y into the second equation,

-3y = -6+12

-3y = 6

y = -2

Substitute the y into the first equation, x= 3/2y,

x = -3

5 0
3 years ago
Preston can paint 375 square feet in 3 hours. At the same rate, how long would it take him to paint 812.5 square feet?
charle [14.2K]

Answer:

6.5 hours

Step-by-step explanation:

First try to find the rate he can paint per hour

375 ÷ 3 = 125 ft^2 per hour

Then try to find how long it should take it for him to paint 812.5 sq ft

812.5 ÷ 125 = 6.5 hours

6 0
3 years ago
Multiply integer by fraction
ELEN [110]
Make the internet a fraction and then multiply them
3 0
3 years ago
19. 7 * 645 =<br> What does it equal
lutik1710 [3]

Answer:

4515

Step-by-step explanation:

5 0
3 years ago
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