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nignag [31]
3 years ago
8

In 2 years, I will be twice as old as I was 5 years ago. My little brother is 3 years younger than I am. Our baby sister is 2 ye

ars younger than he is.
Mathematics
1 answer:
beks73 [17]3 years ago
7 0

Answer:

Step-by-step explanation:

let my present age=x

then 2(x-5)=x+2

2x-10=x+2

2x-x=2+10

x=12

my age=12 years

age of brother =12-3=9 years

age of sister= 9-2=7 years.

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EMERGENCY!!! (WILL GIVE BRAINLIEST)
algol [13]
He walked 5 miles.

5x+60y=35
x+y=1.5

Solutions (via elimination or substitution) are:
x=1
y=.5

x is the number of hours he spent walking, and 5x is the number of miles he walked. 5x=5(1)=5 . He walked for 5 miles. 

y is the number of hours he spent on the bus, and 60y is the number of miles he rode on the bus.  60y=60(.5)=30 . He rode the bus for 30 miles. 
7 0
3 years ago
Determine whether a triangle with the given side lengths is a right triangle.
Vinil7 [7]

Answer:

1st one is not a right triangle.

2nd one is not a right triangle.

3rd one is not a right triangle.

4th one is a right triangle.

Step-by-step explanation:

1, 2, and 3 could also be "not enough information".

7 0
2 years ago
You are throwing a pair of dice. What is the probability that you will get a sum of 2?
xz_007 [3.2K]

Answer:

Total favourable outcomes = 36

No. of favourable outcomes of getting a sum of 2 = 1

Probability of getting a sum of 2 = 1/36

7 0
3 years ago
Determine whether the statement is true or false, and explain why.
Zielflug [23.3K]

Answer:

False

Step-by-step explanation:

In this case, i woudnt reccomend to use integration by parts, becuase you are not simplifying the expression by doing an integration and a derivation. It is not easy to integrate 1/x³+1, and if you derivate it, then a natural logarithm would appear, and the integral wont be easier after this parts step.

It is a better idea to use integration by substitution. Note that if you replace x³+1 by a variable y, we have that dy = 3x² dx. We can easily make a 3xdx appear in the integral by multiplying and dividing by 3, solving the integral easily:

\int\limits_0^1 x^2/x^3+1 \, dx = 1/3 * \int\limits_1^2 du/u = (ln(2) - ln(1) )/3

(Note that, if x ranges from 0 to 1, then u = x³+1 ranges from 0³+1 = 1 to 1³+1 = 2)

4 0
3 years ago
Which expression is equivalent to 3m+ 1 - m<br> A: 2 + m- 1 + m<br> B: 1 + m<br> C: 3m- 1<br> D: 3m
Vanyuwa [196]
The answer is D .............
7 0
3 years ago
Read 2 more answers
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