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Harman [31]
3 years ago
7

Write an expression that is equivalent to the following: x+x+x+x-20

Mathematics
2 answers:
SSSSS [86.1K]3 years ago
8 0

Answer:

4x-20 is the same as x+x+x+x-20

erastovalidia [21]3 years ago
4 0
Find the other numbers which are the x till you fin what gets you 20
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Given the check digit is 3, find the missing X for the master card number 5164 2X13 2705 0183
Gekata [30.6K]

Answer:

9

Step-by-step explanation:

So there's 3 1's, 2 2's, 2 3's, 1 4, 2 5's, a 6, a 7, an 8, 2 0's, and no 9's.  

5 0
3 years ago
Read 2 more answers
help with number 2 please i have no idea how to do this. it would be very helpful if you can show the steps
zloy xaker [14]
So in this case, we have to replace the known value.
y=3
y=-2x+3

3=-2x+3

Then we leave our unknown value alone.
\frac{3-3}{2}= x

In this case, our x value would be 0.

We check it...
3=-2(0)+3
3=0+3
3=3

So y=3 x=0

For the second one we have...
y=3x+2
y=-3x-4

For this we substitute the y in any of the equation...
3x+2=-3x-4

We move the unknown values to one side and the ones without unlown values to the other side...
3x+3x=-4-2

Then we solve
6x=-6

Then we leave the unknown value alone.
x=\frac{-6}{6}

Then solve for x.
x= -1

Then for our y value we return to one of the original equations and substitute the x value.
y=3x+2
y=3(-1)+2
y=-3+2
y=-1

y=-3x-4
y=-3(-1)-4
y=3-4
y=-1

So in this case we got that x= -1 and y= -1
4 0
3 years ago
Please help thank u!
ale4655 [162]

Answer:

6=65

Step-by-step explanation:

34

5 0
3 years ago
If f(x)=-2x^2+5x-3 and g(x) is the reflection of f(x) across the y-axis, then an equation of g is which of the following
Ymorist [56]

To reflect a function across the y-axis you have to change

x\mapsto -x

So, the function becomes

f(x)=-2x^2+5x-3 \mapsto f(-x)=-2(-x)^2+5(-x)-3=-2x^2-5-3

3 0
3 years ago
Encuentre la suma: 564 + 3,598 =?<br> 3,034<br> 4,052<br> 4,162<br> 9,238
Scrat [10]
The answer is 4,162 for 564+3,598
5 0
3 years ago
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