if in each 15 questions he solve 4 so by dividing 60 by 15 we get 4 . so we multiply 4 by 4 and we get 16
The first step for solving this expression is to multiply 4 by 4.
16x² × x
Remember that if a term doesn't have an exponent,, it is considered that the exponent is actually 1. This changes the expression to the following:
16x² ×
Now multiply the terms with the same base by adding their exponents.
16
Lastly,, add the exponents together to get your final answer.
16x³
Let me know if you have any further questions.
:)
Answer:
1 4/17
Step-by-step explanation:
3 1/2 ÷ 2 5/6
= 7/2 ÷ 17/6
= 7/2 * 6/17
= 21/17
= 1 4/17
There are two steps to this problem. The first step is to make an equation for the cost of each company. The cost of each one involves 2 variables. However, we can ignore the number of days since the question asks for per day.
CostA = 90 + .40(miles)
CostB = 30 + .70(miles)
We want to know when A is a better deal or when A costs less. That is when CostA < CostB. We can then substitute the right sides of our equations into the inequality. This will give:
90 + .40(miles) < 30 + .70(miles) This is where we will now begin to solve for the number of miles.
-30 -30 Subtract 30 from both sides.
60 + .4(miles) < .7(miles) Simplify
-.4(miles) -.4(miles) Subtract .4(miles) from both sides
60 < .3(miles) Simplify
/.3 /.3 Divide both sides by .3
200 < miles Simplify
So for A to cost less the number of miles must be greater than 200.