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Lera25 [3.4K]
2 years ago
11

If f(x) = 3x +9 x when f(x) = 30

Mathematics
1 answer:
den301095 [7]2 years ago
3 0

Answer:

x=5/2

Step-by-step explanation:

When f(x)=30, we have 3x+9x=30.

Combining like terms on the right side, we have 12x=30.

Finally, dividing by 12 we get x=30/12.

We note that 30=6*5 and 12=6*2, so 30/12=5/2.

So, \boxed{x=5/2} and we're done!

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If G is the midpoint of FH, FG= 14x + 25 and GH = 73- 2x, find FH
Alenkinab [10]
Given that G is the midpoint of FH, then:
FG=GH
hence;
14x+25=73-2x
solving for x we get:
14x+2x=73-25
16x=48
x=48/16
x=3
therefore the length FG=14x+25 will be:
14*3+25
=67
hence FH will be:
FH=67*2=134
4 0
3 years ago
The choir sells tickets to its performances for an assortment of prices and gives some tickets away. The choir
galina1969 [7]

The least square regression equation for the information provided is y = 9.72x - 40.776

<u>The general equation of a regression model can be expressed thus</u>:

  • y = bx + c

  • Slope, b = r(Sy/Sx)

Calculating slope, b :

  • b = 0.81(177.6 / 14.8) = 9.72

<u>Plugging the values of b, y and x into the equation in other to calculate c</u> :

696 = 9.72(75.8) + c

696 = 736.776 + c

c = 696 - 736.776

c = - 40.776

Therefore, the linear regression model can be expressed as : y = 9.72x - 40.776

Learn more :brainly.com/question/18405415

3 0
2 years ago
Which reason is the correct answer
Furkat [3]
Answer:
D. Reflexive Property


Explanation:
In order to prove that segment AB is congruent to segment ED, you need to first prove that triangle ACB is congruent to triangle ECD.
Reflexive property is not used as a reason to prove since no angles or segments are shared.

Hope this helps!!
Please give me brainliest if it is correct :)
5 0
3 years ago
Which expression is equivalent to<br> (r-7)6?
lapo4ka [179]

Answer:

Step-by-step explanation:

The expression equivalent to

( r^{-7})^{6}     \\is\\\frac{1}{r^{42} }

Hope it helps :)

3 0
3 years ago
Tell which value of the variable is the solution of the equation.
vitfil [10]

Answer:

w = 5

Step-by-step explanation:

6w/6 = 30/6

= 5

6 0
2 years ago
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