(7x -7) + (6x +6) = 90
take away the parenthesis: 7x - 7 + 6x + 6 = 90
combine like terms: 13x - 1 = 90
add 1 to both sides: 13x = 91
divide both sides by 13: <span>x = 7.
Now: substitute x = 7 into the angles: the first angle is 42 degrees, the second angle is 48 degrees</span>
Answer:
Step-by-step explanation:
15 percent of what number is 12?
12 is 15% of 80
Steps to solve "12 is 15 percent of what number?"
We have, 15% × x = 12
or,
15
100
× x = 12
Multiplying both sides by 100 and dividing both sides by 15,
we have x = 12 ×
100
15
x = 80
If you are using a calculator, simply enter 12×100÷15, which will give you the answer.
Answer:
Step-by-step explanation:
1 gallon = 3.78litres
hence if the acid is $33.19/gal
3.78 litres will be sold for $33.19
while
1 litre will be sold for $33.19/3.78
1 litre will be sold for $8.78
hence the cost per liter is $8.78
Answer:
The length of the diagonal is 11.879 units
Step-by-step explanation:
On any rectangle or square, any 2 adjacent sides and the diagonal that connects them makes a right triangle. The diagonal is the hypotenuse of that right triangle, and you can find it using the pythagorean theorem:
where a and b are the sides, and c is the diagonal.
