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aleksandrvk [35]
2 years ago
14

18 years from now, sonja's age will be 4 times her age 9 years ago. Find her present age.

Mathematics
1 answer:
zloy xaker [14]2 years ago
7 0

Answer:

36 i think

Step-by-step explanation:  

18-9= 9

9 times 4 is 36

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Can someone plz help this is like my 5th time putting up this question!!!
serg [7]

Answer:

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3 0
3 years ago
A manufacturer of cell phone screens is concerned because 12 percent of the screens manufactured using a previous process were r
fomenos

Answer: A.

H_0:p=0.12\\\\H_a:p

Step-by-step explanation:

Null hypothesis(H_0) : A statement describing population parameters as per the objective of the study. It usually takes "≤,≥,=" signs.  

Alternative hypothesis (H_a): A statement describing population parameters as per the objective of the study. It usually takes ">, <, ≠" signs.

Let p be the proportion of screens that will be rejected.

12 percent of the screens manufactured using a previous process were rejected at the final inspection.

(i.e. p= 0.12)

Objective of the study = whether the new process<em> reduces </em>the population proportion of screens that will be rejected

i.e. p< 0.12

So, the appropriate hypotheses to investigate whether the new process reduces the population proportion of screens that will be rejected:

H_0:p=0.12\\\\H_a:p

8 0
3 years ago
Dave makes 12 groups of 10 rocks and has none left over. How many rocks does Dave have?
zhannawk [14.2K]


120

because 12X10 is 120 and he has 12 groups of 10

5 0
3 years ago
Read 2 more answers
What is the solution to the equations x^2-2x+y=8 and x-y=-2
kherson [118]
Hello!!

For the first equation:

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y = -x^2 + 2x +8

For the second equation:

x - y = -2   (Solve for y)

-y = -x - 2

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Good luck :)

6 0
4 years ago
(Combining Equations)What is the result of adding these two equations ? 2x + 3y = -5 5x - y = -12
lara [203]

7x +2y =-17 ..... Finally, answer

2x + 3y = -5

+

5x -y = -12

---------------------------

7x +2y = -17

3 0
1 year ago
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