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frez [133]
3 years ago
6

-3x - 8 + 6x = 7 wat is the answer

Mathematics
2 answers:
Aliun [14]3 years ago
7 0
3x-8+6x=7
9x-8=7
9x=15
x=9/15
x=3/5

Fudgin [204]3 years ago
5 0
Answer:  " x = 5 " .
_______________________
Solve for "x"  ;  Given:  " -3x - 8 + 6x = 7 " ;
____________________
Combine the "like terms" on the left-hand side of the equation:

-3x + 6x = + 3x ;
__________________________
Rewrite the equation:

3x - 8 = 7 ;
________________
Add "8" to EACH SIDE of the equation:
____________________________
   3x - 8 + 8 = 7 + 8 ;
____________________________
to get:

        3x = 15  ;
____________________________
Divide EACH SIDE of the equation by "3" ; to isolate "x" on one side of the equation; and to solve for "x" ;
____________________________
        3x / 3 = 15 / 3  ;
____________________________
             x =  5  .
____________________________
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2 years ago
Which expression is equivalent to 2 (×+7)-18×+4/5
Ksivusya [100]

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14.8-16x

Step-by-step explanation:

2x+14-18x+0.8

14.8-16x

4 0
3 years ago
Miguel is a golfer, and he plays on the same course each week. The following table shows the probability distribution for his sc
aivan3 [116]

1) 4.55

2) Short hit

Step-by-step explanation:

1)

The table containing the score and the relative probability of each score is:

Score 3 4 5 6 7

Probability 0.15 0.40 0.25 0.15 0.05

Here we call

X = Miguel's score on the Water Hole

The expected value of a certain variable X is given by:

E(X)=\sum x_i p_i

where

x_i are all the possible values that the variable X can take

p_i is the probability that X=x_i

Therefore in this problem, the expected value of MIguel's score is given by:

E(X)=3\cdot 0.15 + 4\cdot 0.40 + 5\cdot 0.25 + 6\cdot 0.15 + 7\cdot 0.05=4.55

2)

In this problem, we call:

X = Miguel's score on the Water Hole

Here we have that:

- If the long hit is successfull, the expected value of X is

E(X)=4.2

- Instead, if the long hit fails, the expected value of X is

E(X)=5.4

Here we also know that the probability of a successfull long hit is

p(L)=0.4

Which means that the probabilty of an unsuccessfull long hit is

p(L^c)=1-p(L)=1-0.4=0.6

Therefore, the expected value of X if Miguel chooses the long hit approach is:

E(X)=p(L)\cdot 4.2 + p(L^C)\cdot 5.4 = 0.4\cdot 4.2 + 0.6\cdot 5.4 =4.92

In part 1) of the problem, we saw that the expected value for the short hit was instead

E(X)=4.55

Since the expected value for X is lower (=better) for the short hit approach, we can say that the short hit approach is better.

8 0
3 years ago
Given that f(x)=x^2-4x -3 and g(x)=x+3/4 solve for f(g(x)) when x=9
SSSSS [86.1K]

Answer:

f(g(9)) = 945/16

Step-by-step explanation:

To find f(g(x)), you have to substitute g(x) wherever there is an x in f(x).

g(x) = x + 3/4

f(x) = x² - 4x - 3

f(g(x)) = (x + 3/4)² - 4(x + 3/4) - 3

f(g(x)) = x² + 3/2x + 9/16 - 4x + 3 - 3

f(g(x)) = x² - 5/2x + 9/16 + 3 - 3

f(g(x)) = x² - 5/2x + 9/16

Now, put a 9 wherever there is an x in f(g(x)).

f(g(9)) = (9)² - 5/2(9) + 9/16

f(g(9)) = 81 - 5/2(9) + 9/16

f(g(9)) = 81 - 45/2 + 9/16

f(g(9)) = 117/2 + 9/16

f(g(9)) = 945/16

7 0
3 years ago
Find each product.Is it an enlargement or reduction?
allsm [11]
Yessss that should be correct
4 0
2 years ago
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