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Lilit [14]
3 years ago
13

One brother says of his younger brother: “Two years ago, I was three times as old as my brother was. In three years’ time, I wil

l be twice as old as my brother.” How old are they each now?
Good Luck!!
Mathematics
2 answers:
aleksklad [387]3 years ago
5 0

Answer:

17

Step-by-step explanation:

Let us suppose two years ago my brother's age was x years

Then, my age was 3x

Three years from now, my brother's age will be (x +2+3) = (x+5) years

And my age will be (3x+2+3) = (3x+5) years

But it is given that i will be twice as old as my brother.

So, 2(x+5)= (3x+5)

or, x= 5 years

So my brother's present age is 5+2= 7 years

And my age is 5*3+2= 17 years

Crank3 years ago
4 0
Pretty sure that the answer is 17
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4.) 960 meters in 15 seconds<br> Write the following rate as a unit rate
murzikaleks [220]

Answer:

64

Step-by-step explanation:

960 divided by 15 is 64. The unit rate means one so you are trying to get it to 1 second so just do 15 divided by 15 which is 1, then 960 divided by 15 which is 64

7 0
3 years ago
Samantha sends her son, Barry, to a preschool center on certain days. The cost of preschool is $45 per day along with a fixed mo
Hatshy [7]

Answer: Option D

D. 880 = 45d + 70; 18 days

Step-by-step explanation:

We know that the cost of preschool is $ 45 per day plus a monthly fee of $ 70.

We also know that a total of $ 880 was paid last month

To write an equation that represents this situation, let us call d the number of days that Barry attends school

So the cost was:

45d + 70 = 880

Now we solve the equation for the variable d

45d= 880-70

45d= 810

d= \frac{810}{45}

d= 18\ days

The answer is the option D

6 0
4 years ago
Can someone please help me with this?
dsp73

Answer:

S_{13} = 403

Step-by-step explanation:

the sum to n terms of an arithmetic series is

S_{n} = \frac{n}{2} (a + l) ← a is the first term and l the last term

here a = - 5 and l = 67 , then

S_{13} = \frac{13}{2} (- 5 + 67) = 6.5 × 62 = 403

3 0
3 years ago
What is the answer? -9=3+6x
HACTEHA [7]
Use inverse operations and subtract 3 from 9 which is -12 then divide -12 by 6 which is -2
-9=3+6x
-3 -3
-12=6x
-12/6=6x/6
-2=x
6 0
3 years ago
Find the slope of the line through the points (7,4) and (-10,4).
algol [13]

Answer:

0

Step-by-step explanation:

We have 2 points on a line so we can use the slope formula

m = (y2-y1)/(x2-x1)

   = (4-4)/(-10-7)

   = 0/-17

  = 0

7 0
3 years ago
Read 2 more answers
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