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shtirl [24]
3 years ago
14

John is twice as old as Fred. Four years ago John was 6 times as old. How old is John?

Mathematics
2 answers:
kari74 [83]3 years ago
7 0

I think john is 10 years old hope that helps.

Crazy boy [7]3 years ago
7 0

These two equations from the question!
Fred + 6 = John , John + 4 = 2Fred

Now we’re going to use the 2nd equation:
John + 4 = 2Fred
(Fred + 6) + 4 = 2Fred
Fred + 10 = 2Fred
10 = Fred

Now we’re re going to use first equation:
Fred + 6 = John
10 + 6 = John

So, John is 16 years old!
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Parallel to y=2/3x+6 through (-3, 6)
Lana71 [14]

Answer:

y = (2/3)x + 8

Step-by-step explanation:

Parallel lines have the same slope. In the given equation, the slope is 2/3 so the slope of the parallel line will also be 2/3.

y = (2/3)x + ?

Plug in (-3, 6) for (x, y) in the equation.

6 = (2/3)(-3) + ?

6 = -2 + ?

? = 8

Final equation: y = (2/3)x + 8

7 0
3 years ago
The regular pentagon below is a scale drawing of an original pentagon that was made by using a scale factor of One-fourth. A hex
Lana71 [14]

Answer:

-The scale drawing represents a reduction

-each side of the original is 22 in long

-the scale drawing is proportional to the original

Step-by-step explanation:

8 0
3 years ago
A meteorologist measures the angle of elevation of a weather balloon is 41 degrees. A radio signal from the balloon indicates th
I am Lyosha [343]
You can draw a diagram of the situation, representing it by a right triuangle.

In the right triangle the hypotenuse is the distance indicated by the radio signal, 1503 m, and the angle is 41°.

The opposed leg to 41° is the height of the ballon.

Then you can use the sine trigonometric function.

sine (41°) = opposed leg / hypotenuse = x / 1503 m => x = 1503m * sine(41°)

=> x = 986m.

Answer: 986m
4 0
3 years ago
A standard number cube is tossed. Find the following probability. ​P(greater than 4 or odd​)
lorasvet [3.4K]
A standard cube has 6 possible outcomes. But since we want to find P(4+ or odd), the outcomes become more narrow.
So:
6 outcomes -> 1, 2, 3, 4, 5, 6

But we want to find 4+
So:
4+ = 4, 5, 6

We also want to find all odd possibilities.
So:
odd = 1, 3, 5

As you can see, there is a 5 in both the 4+ and the odd numbers so 5 will only be counted once.
P(4+ or odd) = 1, 3, 4, 5, 6

So the probability of having an outcome that is P(4+ or odd) is:
5/6 or 0.8333 or 83.33%

Hope I helped!
8 0
3 years ago
Read 2 more answers
Sarah is making her own costume for her role in the school play. The costume requires 25/8 yards of material. Select the number
BARSIC [14]

Answer:

Step-by-step explanation:

25/8

8*3=24

25-24=1

3 1/8

8 0
3 years ago
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