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Leona [35]
3 years ago
8

Joshua is five years older than David. Simon is four years older than Joshua and nine years older than David. Simon’s and David’

s ages added together equal 15. How old are the boys?
Mathematics
1 answer:
Tasya [4]3 years ago
8 0
David's age: x
Joshua: x + 5
Simon: (x+5) + 4 or x + 9

Simon's age + David's age = 15
(x+9) + (x) = 15
2x = 15 - 9
2x/2 = 6/2
x = 3

The ages of the boys:

David: x = 3 years old
Joshua: 3+5 = 8 years old
Simon: 3+9 = 12 years old



Read more on Brainly.ph - https://brainly.ph/question/1602102#readmore
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olga2289 [7]

Number of people in the canoes which hold 2 people =

485 - 273 = 212 therefore there are 212 / 2 = 106 canoes holding 2 people.

The number of canoes holding 3 people = 273/3 = 91

Total number of canoes = 106 + 91

=<u> 197</u>  (answer)

Hope this helps

7 0
3 years ago
Part A: Describe how you can use similar triangles to explain why the slope of the graph between points A and B is the same as t
Katena32 [7]

Answer:

a) if you where to go down two to the left one it would connect from a to b and from b to c. these triangles all equal to each other.

b) the inital value is 63 since you y intercept is 63 and your slope is 2. 63 is the distance at 0 mins over time the slope is 2 per min

4 0
3 years ago
The event coordinator asks you to determine how many students participated in the track-and-field day. The total number of stude
kakasveta [241]
584 is the total number of students in the school.

5/8 are in seventh grade and 3/8 are in eighth grade.

4/5 of the seventh graders participated in the track meet, so there were (4/5 · 5/8) · 584 students in the seventh grade participating in the track meet.

7/8 of the eighth graders participated, so there were (7/8 · 3/8) · 584 students in the eighth grade participating in the track meet.

So, all together, there were

(4/5 · 5/8) · 584 + (7/8 · 3/8) · 584 students from the school in the track meet.

Let's simplify as you asked:

(4/5 · 5/8) · 584 + (7/8 · 3/8) · 584 = [(4/5 · 5/8) + (7/8 · 3/8)] · 584 (distributive property - factoring)

= [20/40 + 21/64] · 584 (multiply fractions)

= (1/2 + 21/64) 584 (reduce the first fraction to lowest terms)

= (32/64 + 21/64) 584 (getting a common denominator)

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All together, there were: 483.625 students in the meet.
8 0
3 years ago
Simplify the expression
Ronch [10]

Answer:

(3 x)/(5 x + 2)

Step-by-step explanation:

Simplify the following:

(3 x^2)/(5 x^2 + 2 x)

Hint: | Factor common terms out of 5 x^2 + 2 x.

Factor x out of 5 x^2 + 2 x:

(3 x^2)/(x (5 x + 2))

Hint: | For all exponents, a^n a^m = a^(n + m). Apply this to (3 x^2)/(x (5 x + 2)).

Combine powers. (3 x^2)/(x (5 x + 2)) = (3 x^(2 - 1))/(5 x + 2):

(3 x^(2 - 1))/(5 x + 2)

Hint: | Evaluate 2 - 1.

2 - 1 = 1:

Answer:  (3 x)/(5 x + 2)

8 0
3 years ago
Read 2 more answers
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Anna11 [10]

Answer:

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Step-by-step explanation:

First, convert the mixed numbers into improper fractions, 11/4*7/8

Next, you can just multiply the fractions for your answer!

Hope this helped<3

7 0
2 years ago
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