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Readme [11.4K]
3 years ago
5

10

Mathematics
2 answers:
shutvik [7]3 years ago
6 0

Answer:15

Step-by-step explanation:

pshichka [43]3 years ago
3 0
The answer is 15 hope it helps
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John is twice as old as his son. In 42 years, the ratio of their ages will be 4:3. What is the son's current age?
dsp73

Answer: Jhon is 42 years old, and his son is 21 years old.

Step-by-step explanation:

Let's define:

J = John's age

S = Age of the son.

We know that:

"John is twice as old as his son"

J = 2*S

"In 42 years, the ratio of their ages will be 4:3. What is the son's current age?"

In 42, their ages will be:

J + 42 and S + 42.

And the ratio 4:3 means that:

(J + 42) = (4/3)*(S + 42)

Then we have the system of equations:

J = 2*S

(J + 42) = (4/3)*(S + 42)

To solve it we can first replace the first equation into the second one, to get:

(2*S + 42) = (4/3)*(S + 42)

2*S  - (4/3)*S = (4/3)*42 - 42

S*(6/3 - 4/3) = (1/3)*42

S*(2/3) = (1/3)*42

S = (3/2)*(1/3)*42 = 21.

And we can find Jonh's age if we use the first equation:

J = 2*S = 2*21 = 42

Jhon is 42 years old, and his son is 21 years old.

8 0
3 years ago
What is 5/6 over 1 1/4
spin [16.1K]

Answer:

2/3

Step-by-step explanation:

Divide 5/6 by 5/4

Find the Reciprocal of 5/4

5/6 times 4/5

5/3 time 2/5

10/15

2/3

8 0
3 years ago
Points J and K lie in plane H.
Vlad [161]

Answer: 1

Step-by-step explanation:

From the given picture, it can be seen that there is a plane H on which two pints J and K are located.

One of the Axiom in Euclid's geometry says that <em>"Through any given two points X and Y, only one and only one  line can be drawn "</em>

Therefore by Axiom in Euclid's geometry , for the given points J and K in plane H , only one line can be drawn  through points J and K.

6 0
3 years ago
Read 2 more answers
What is the value of x in the equation ?StartFraction 2 Over 3 EndFraction left-parenthesis StartFraction one-half EndFraction.
Veronika [31]

Answer:

dont know sorry i wish i could help you use the internet

Step-by-step explanation:

4 0
3 years ago
Solve the formula C = πd for d
REY [17]

Answer:

d = \frac{C}{\pi}

Step-by-step explanation:

C= \pi d\\

Isolate d ; Divide both sides of the equation by \pi

\frac{C}{\pi} = \frac{\pi d}{\pi }

Simplify

\frac{C}{\pi} = d\\\\d = \frac{C}{\pi}

Note; Another formula for d(diameter) =

2\times radius

3 0
3 years ago
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