Answer:
It's not quite right to give the direct answer, yet it's brainly, so i'll do my best. All you have to do is line up all of them from least to greatest, then you have to find the middle of all the numbers. the direct middle, like the middle of a number line, with these specific numbers. Hole this helps!
Step-by-step explanation:
Answer:6 + 8
Step-by-step explanation:
Add the numbers
Combine like terms
Answer:
√30
Step-by-step explanation:
We can find the value of x by using Euclidean theorem
x^2 = 3 × 10
if x^ = 30 then x = √30
X - the number of pencils
y - the number of pens
She has twice as many pencils as she has pens.

Tom borrows a pen, so she has y-1 pens. Now she has ten less pens than pencils.

Set 2y and y+9 equal to each other:
She has 9 pens.
I’m not sure I’m just guessing but maybe 7x minus 35