If she maintains her average amount of movies bought every week, then she will buy 20 DVDs in 10 weeks. Explanation: she buys 4 every week, so if we want to find out how many are in 10 weeks, we must multiply two until we get to 10 ( five weeks ) then multiply that buy her average of movies. And that is how we get the answer of 20 DVDs! ( her at least I did )
Anyways, hope this helps!
Answer:
Simplified expression is 1.8i+0.6s
Step-by-step explanation:
Answer:
Step-by-step explanation:
-9x - 5 - 8 + x =
-8x - 13 <==
Given:
The sum of the angles in a hexagon is 720°.
To find:
(a) Equation to solve the value of x.
(b) The value of x.
(c) The measure of angle C.
Solution:
(a)
We have,
The sum of the angles in a hexagon is 720°.
Therefore, the required equation is .
(b)
On solving the above equation, we get
Divide both sides by 3.
Therefore, the value of x is 42.29.
(c)
We need to find the measure of angle C.
Therefore, the measure of angle C is 126.87 degrees.
4 gallons of water is needed to dilute to a concentration of 10%.
<u>Step-by-step explanation:</u>
It is given that,
The 5 gallons of water contains 18% of acid solution.
Now, we are asked to find the gallons of water needed to dilute it to a concentration of 10% acid solution.
We obtain the equation by stating that the amount of acid 10% in the water must dilute up to 18%.
For this, x amount of water should be added.
Therefore, the equation is framed as,
⇒ 0.1 (x+5) = 5 (0.18)
⇒ 0.1x + 0.5 = 0.9
⇒ 0.1x = 0.9 - 0.5
⇒ x = 0.4 / 0.1
⇒ x = 4
∴ 4 gallons of water is needed to dilute to a concentration of 10%.
