If a were to be doubled, and be 10 more than the initial number, the value of a would also have to be 10 because when it is doubled, it becomes 20, and you can see that adding 10 to it will also make it be 20. The value of a would have to be 10.
Answer:
C) 25
Step-by-step explanation:
First, solve for the height (red dotted line) using the Pythagorean theorem 9²+b²=15²
81+b²=225
b²=225-81
b²=12
Then set up a ratio.
x/12=9/15
simplify
x/12=3/5
cross-multiply
3x=60
x=20
This gives us the base. Now we can solve for x using the Pythagorean theorem again.
20²+15²=x²
400+225=x²
625=x²
√x²=√625
x=25
Answer:
8$
Step-by-step explanation:
If strawberries cost $2 per pound and she buys 5 pounds we have to multiply the cost of 1 pound by 5.
The discount of 20% is applied to the $ 10, we calculate how much the value of 20% (<em>using a simple rule of three</em>) is and subtract it from $ 10.