A) 2x+x=36
B) 2x+x=36
3x=36
x=12
Kim is 24
Her sister is 12
Answer:
4y^3/2
Step-by-step explanation:
The 4 will remain 4 so we'll leave that alone. √y³ can be written as y^3/2. The way I like to remember how to write fractional exponents is that the index of the radical is the denominator of the fractional exponent and the exponent inside the radical is the numerator.
Answer:
51, 67
Step-by-step explanation:
guessing
Answer:
Ques 1: 7.85
Ques 2: both
and
are rational.
Ques 3: 0.9
Step-by-step explanation:
Ques 1:
Solving the
, we get 7.8485.
Rounding off to nearest hundredth, we see that next digit is 8, so we increase the previous digit by 1.
So, the answer to nearest hundredth is 7.85.
Ques 2:
and
to be checked whether they are rational or irrational.
We know that
is equal to 4.
= -4 which is a rational value.
Let us solve
now.
![\sqrt{0.25} = \sqrt{\dfrac{25}{100}}\\\Rightarrow \dfrac{5}{10}](https://tex.z-dn.net/?f=%5Csqrt%7B0.25%7D%20%3D%20%5Csqrt%7B%5Cdfrac%7B25%7D%7B100%7D%7D%5C%5C%5CRightarrow%20%5Cdfrac%7B5%7D%7B10%7D)
Which is a rational value.
So, both are rational.
Ques 3:
Simplify ![\sqrt{0.81}](https://tex.z-dn.net/?f=%5Csqrt%7B0.81%7D)
0.81 can be written as
in rational form.
Now, taking the square root, we need to take the square root for both Numerator and Denominator and then we can divide to get the desired square root.
![\sqrt{0.81} = \sqrt{\dfrac{81}{100}}\\\Rightarrow \dfrac{9}{10} = \bold{0.9}](https://tex.z-dn.net/?f=%5Csqrt%7B0.81%7D%20%3D%20%5Csqrt%7B%5Cdfrac%7B81%7D%7B100%7D%7D%5C%5C%5CRightarrow%20%5Cdfrac%7B9%7D%7B10%7D%20%3D%20%5Cbold%7B0.9%7D)
So, the answers are:
Ques 1: 7.85
Ques 2: both
and
are rational.
Ques 3: 0.9
You have to make an equation that i forgot what was called but you just take
x+y=10 and multiply it by -2 so the y’s can cancel out
so you’ll end up with:
-2x-2y= -20
(+) x+2y=14
you’ll get : x = -6
then you plug in -6 for x, solve for y and your coordinates will be
(-6 , 10)