21.
So to solve for the value of a variable in an equation, you would need to isolate x on one side. The first thing you have to do is multiply 2 and (x + 7) together, which can be rewritten as 2(x) + 2(7). After multiplying, your equation would be: 
, or A.
22.
So the rule with multiplying exponents with the same base is to add the exponents together, and the rule with dividing exponents with the same base is to subtract the exponents. Your equation will be simplified as such:
Now the rule with converting negative exponents into fractions is 
. In this case, 4^-2 would turn into 
, or C, which is your final answer.
A very simple example problem to satisfy the required above is,
"John has 8 apples and 17 oranges. How much more oranges does John has than apple?"
To answer this item, one needs to subtract the number of apples from the number of oranges. This is as shown below,
D = 17 - 8 = 9
The concept of "how much more than" is linked to finding the difference between the numbers.
Answer:
$4
Step-by-step explanation:
12÷4=3
7÷7=1
3+1=4
therefore she spent 4 dollars
1000 IS THE ANSWER EJN3;RVLGBPOIJGNTIOG;K
Answer:
15 degrees.
Step-by-step explanation:
- 5x + x + 90 = 180.
- 6x + 90 = 180.
- 6x = 90.
- x = 15.
These are all of the steps to completely get the correct answer to this question.
Hope this helps!!!
Kyle.
