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geniusboy [140]
3 years ago
14

Need help with math question

Mathematics
1 answer:
RoseWind [281]3 years ago
5 0

Answer:

sorry for that

Step-by-step explanation:

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Ray is x years old. His brother Ron is y years older than Ray.
Daniel [21]
The sum will be x+y because their ages are variables.
8 0
4 years ago
Read 2 more answers
If DF = 9x -39 find EF
Klio2033 [76]

|DF| = |DE| + |EF|

|DF| = 9x -36

|DE| = 47

|EF| = 3x+10

Substitute:

9x - 39 = 47 + 3x + 10

9x - 39 = 3x + 57     |+39

9x = 3x + 96    |-3x

6x = 96    |:6

x = 16

Put the value of x to the equation |EF| = 3x + 10

|EF| = (3)(16) + 10 = 48 + 10 = 58

Answer: |EF| = 58

7 0
4 years ago
Read 2 more answers
The solution to 4x + 7 - 9 = -14 is a0.
Alchen [17]

Answer:

Isolate the variable by dividing each side by factors that don't contain the variable.

x  =  − 3

Step-by-step explanation:

4 0
3 years ago
A ball is thrown directly up in the air from a height of 5 feet with an initial velocity of 60 ft/s. Ignoring air resistance, ho
Mice21 [21]

Answer:

3.8 seconds

Step-by-step explanation:

Given equation

h= -16t^2 + 60t + 5

When the ball hits the ground then height is 0

So we replace h with 0 and solve for t

0= -16t^2 + 60t + 5

a= -16 , b= 60 and c= 5

Apply quadratic formula to solve for t

t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

=\frac{-60+\sqrt{60^2-4\left(-16\right)\cdot \:5}}{2\left(-16\right)}[/tex[tex]=\frac{-60+-\sqrt{3920}}{-32}

=\frac{-60+-28\sqrt{5}}{-32}

=\frac{4(-15+-7\sqrt{5})}{-32}

=\frac{(-15+-7\sqrt{5})}{-8}

Now make two fractions and solve for x

t= -\frac{7\sqrt{5}-15}{8}=-0.0815

t= \frac{7\sqrt{5}+15}{8}=3.83

So answer is 3.8 seconds


4 0
3 years ago
3+x=3 whats the answer its 100 points
schepotkina [342]
X is 0 so that means you answer would be 3+0=3
5 0
3 years ago
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