4 years ago

Please answer correctly !!!!!!! Will mark brainliest !!!!!!!!!!

Mathematics

1 answer:

astra-53 [7]4 years ago

6 0

Answer:

9 years.

Step-by-step explanation:

Make x the number of years passed.

$\frac{39+x}{3+x}=4$

12 + 4x = 39 + x

27 = 3x

x = 9

You might be interested in

Which expressions are equivalent to 5^x

Mice21 [21]

Answer:

2^x

Step-by-step explanation:

5 0

3 years ago

QUICKK - Which inequality matches the graph?

Marizza181 [45]

$5a < 20 \\ a < \frac{20}{5} \\ a < 4$

5 0

2 years ago

Read 2 more answers

The graph of r = -10 cos θ has which of the following characteristics?

Ronch [10]

Step-by-step explanation:

If we convert

$r = - 10 \cos(x)$

to a Cartesian equation,

${r}^{2} = - 10 r \: \cos(x)$

${x}^{2} + {y}^{2} = - 10x$

${x}^{2} + 10x + {y}^{2} = 0$

${x}^{2} + 10x + 25 + {y}^{2} = 25$

$(x + 5) {}^{2} + {y}^{2} = 25$

So we have a circle with center (-5,0), with a diameter of 10.

8 0

2 years ago

If Mike has m pencils and Sarah has three times as many pencils as Mike, how many more pencils does Sarah has?

svetlana [45]

Answer:

Step-by-step explanation:

the answer is 3m becaus three represents the times. And m represents mike.

4 0

3 years ago

Read 2 more answers

Which is a unit rate?

sineoko [7]

Answer:

20 gallons for 2 hours

Step-by-step explanation:

.........................................

5 0

3 years ago