Answer: 18
Step-by-step explanation:
First we want to turn 20% into a decimal so we can multiply it by 90.
So to do that we divide 20 by 100.
20/100=0.2 so 0.2 is the decimal form of 20%.
Then we multiply 90 by 0.2 to get 18 as our answer.
Answer:
436 square feet will not be provided for
Step-by-step explanation:
In this question, what we are simply asked to do is to calculate the area of the backyard that would be left after installing a square Hottub.
To get the answer here, what is necessary to do is to subtract the area of the square hot tub from the area of the rectangular yard.
Mathematically, the area of the mathematical yard would be :length * width: the length here is 10 feet and the width is 50 feet.
The area is thus 10 * 50 = 500 square feet
Now, we calculate the area of the square hottub = S^2 where S is the length of the side of the square. In this particular case, S = 8. The area of the square is thus; 8 * 8 = 64 square feet
Now the area left uncovered would now be; 500 sq feet - 64 square feet = 436 square feet
Supplementary angles because they add to 180 degrees
Let the number of hamburgers = h
Let the number of cheeseburgers = c
Now we translate the given information into equations.
"combined total of 770 [ham]burgers and cheeseburgers"
h + c = 770
<span>"there were 70 more cheeseburger sold than hamburgers"
</span><span>
</span><span>c = h + 70
</span><span>
</span><span>
</span><span>Our system of equations is
</span><span>
</span><span>
</span><span />h + c = 770
c = h + 70
The second equation is already solved for c, so we replace c of the first equation with h + 70.
h + h + 70 = 770
2h + 70 = 770
2h = 700
h = 350
Answer: 350 hamburgers were sold on Monday.