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3 years ago

Dupe age and olu age add up to 25 years eight years ago,Dupe was twice as old as olu.How old are they?

Mathematics

1 answer:

lana66690 [7]3 years ago

3 0

Answer:

dupe is 20, olu is 5

Step-by-step explanation:

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Which of the following have the correct solution? Check all

Neko [114]

Step-by-step explanation:

To do this, we will substitute the x values to their corresponding equations,

$2x + 5 \\ = 2(7) + 5 \\ = 14 + 5 \\ = 19$

Given 2x + 15 = 19

Calculated 2x + 15 = 19

Given = Calculated, this solution is correct.

$3 + x + 2 -x \\ = 3 + 3 + 2 - 3 \\ = 8 - 3 \\ = 5$

Given 3 + x + 2 - x = 16

Calculated 3 + x + 2 - x = 5

Given not equal to calculated, this solution is incorrect.

$\frac{x + 2}{5} \\ = \frac{8 + 2}{5} \\ = \frac{10}{5} \\ = 2$

Given (x+2)/5 = 2

Calculated (x+2)/5 = 2

Given = Calculated, this solution is correct.

$6 = 2x - 8 \\ 2x - 8 = 6$

$2x - 8 \\ = 2(7) - 8 \\ = 14 - 8 \\ = 6$

Given 2x - 8 = 6

Calculated 2x - 8 = 6

Given = Calculated, this solution is correct.

$14 = \frac{1}{3} x + 5 \\ \frac{1}{3} x + 5 = 14$

$\frac{1}{3} x + 5 \\ = \frac{1}{3}(18) + 5 \\ = \frac{18}{3} + 5 \\ = 6 + 5 \\ = 11$

Given 1/3x + 5 = 14

Calculated 1/3x + 5 = 11

Given not equal to Calculated, this solution is not correct.

Therefore the Correct solutions are 1,3 and 4.

8 0

3 years ago

Alexandra is two years older than brad. cecilia is three years younger than alexandra. all three ages added together gives a tot

MatroZZZ [7]

Let us say that:

x = age of brad

x + 2 = age of Alexandra

(x + 2) – 3 = age of Cecilia = x – 1

We are also given that:

x + x + 2 + x – 1 = 37

<span>
solving for x:</span>

3x + 1 = 37

3x = 36

x = 12 = age of brad

x + 2 = 14 = age of Alexandra

<span>x – 1 = 11 = age of cecilia</span>

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3 years ago

John rented a truck for one day. There was a base fee of $18.95 , and there was an additional charge of 75 cents for each mile d

kicyunya [14]

$212.45 = 18.95 + .75x$
He drove 258 miles

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4 years ago

Noah was doing some homework and answer the following question 5.5• - 3/5 =

Naddika [18.5K]

Answer:

-33/10 or -3.3

Step-by-step explanation:

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3 years ago

For the given angle measure(angle measure is 120), find the measure of a supplementary angle and the measure of a complementary

insens350 [35]

Answer:

supplementary angle = 60 , complementary angle : none

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3 years ago

Dupe age and olu age add up to 25 years eight years ago,Dupe was twice as old as olu.How old are they?​

Dupe age and olu age add up to 25 years eight years ago,Dupe was twice as old as olu.How old are they?