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mars1129 [50]
3 years ago
14

Can someone help my devil of a brother number 2?

Mathematics
1 answer:
Katen [24]3 years ago
8 0
Is that the math question?
You might be interested in
3(2x + 11) and (3x + 15)(2)
algol [13]

Answer:

3(2x+11)= 6x+33  and (3x+15)(2) = 6x+30

Step-by-step explanation:

Use distributive property to multiply the outside factor to each factor inside the parenthesis.  

3(2x+11)

(3*2x)+(3*11)

6x+33

3 0
3 years ago
How many places do you need to move the decimal to the right to write
GenaCL600 [577]

Answer:

7 places.

Step-by-step explanation:

There are seven zeros, so in powers of ten notation it is written as 10^{-7}

2.1 \times 10^{-7}

6 0
3 years ago
Lana is the oldest of four sisters. Her youngest sister is half her age. The other two sisters are twins $2$ years younger than
vagabundo [1.1K]
Let the youngest sister be n years
Lana will be 2n years, as her youngest sister is half her age
The age of the twins separately will be 2n-2 as they are 2 years younger than Lana
So, the equation looks like this:
n + 2n + 2(2n-2) = 45
Now solve for n:
3n + 4n - 4 = 45
7n - 4 = 45
7n = 49
n = 7
So the youngest sister is 7, Lana is 14 and the twins are 12. 14 + 12 + 12 + 7 =45
8 0
3 years ago
The time it takes to cover the distance between two cities by car varies inversely with the speed of the car. The trip takes 5 h
kogti [31]

v=d/t

44=d/5

d=220 mile

v=220/11

v=20 mph

7 0
3 years ago
Adding &subtracting x-60=20
Alex777 [14]
Just add to find X
20 + 60 = 80
-------------------------------------
X = 80
To make sure plug it in
80 - 60 = 20
The equation is true
-----------------------------------------------
x = 80 is your answer
3 0
3 years ago
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