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cupoosta [38]
3 years ago
10

If the mean of the four numbers 2x and 12 is 10, then x is ​

Mathematics
1 answer:
Lelu [443]3 years ago
4 0

Answer:

4

Step-by-step explanation:

The mean of 2x and 12 is (2x+12)/2, so we get the equation:

(2x+12)/2 = 10 =>

x+6=10

x = 10-6 = 4

* Your question states four numbers, but you write only two... the answer could be wrong because of that.

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210 is how many tens? an also what does 240 equals how many tens
qwelly [4]
210 is 21 groups of ten. 240 is 24 tens
6 0
3 years ago
Helppppppppppppppppppppppppppppppppppppppppppppppppppppppp
SVEN [57.7K]

Answer:

A <em> </em><em>and</em><em> </em><em>E</em><em> </em><em>is</em><em> </em><em>true</em><em>. </em><em>BCD</em><em> </em><em>is</em><em> </em><em>False</em>

Step-by-step explanation:

Let convert this into slope intercept form

10y - 200x = 500

10y = 200x + 500

y = 20x + 50

So now let answer these questions,

A is TRUE the slope is the number in front of the x value. It is 20 so a is true.

B is False, Using (0, 500) The equation is wrong

500 = 20(0) + 50 ??

C is false, we have a positive slope so it shifts upward from left to right.

D is false

the slope isn't 200.

E Is true the y intercept is when the x value is 0, what is the y value so plug it in we get

y = 20(0) + 50

It equal 50.

4 0
3 years ago
Read 2 more answers
Graph the line with slope 4 and y-intercept -7
antoniya [11.8K]

Start on -7 since it is the y intercept(b). 4/1 is the slope. So from seven you would go up 4 right 1.

7 0
3 years ago
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What is the area of a rectangle that has a perimeter of 87.20?
harkovskaia [24]
The answer is 43.6 your welcome 87.20 divided by two is 43.6.
5 0
3 years ago
Given f(x) = x^2 - 5x, find f(x-3)
Hoochie [10]

Answer:

f(x-3)= x^2 -11x +24

Step-by-step explanation:

We want to find an equivalent expression for f(x-3)

To do this, we can simply substitute every 'x' variable in f(x) by 'x-3'

Therefore f(x-3)= (x-3)^2 -5*(x-3)

Lets re arrange the expression by grouping terms.

f(x-3)=x^2 - 6x +9 -5x + 15

f(x-3)= x^2 -11x +24

3 0
3 years ago
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