10. 4:5....added = 9
4/9 (1800) = 7200/9 = 800 (red)
5/9 (1800) = 9000/9 = 1000 (green)
there were (1000 - 800) = 200 less red ones then green ones.
11. 7/4 = 21/r
cross multiply
(7)(r) = (4)(21)
7r = 84
r = 84/7
r = 12....Rod has 12 stickers
12. 14/4 = 3.5 eggs per cup
for 16 cups...16 * 3.5 = 56 eggs
Answer:
there are two solutions:
a) , and
b)
Step-by-step explanation:
In the equation: , since a perfect square with the unknown "y" is isolated on the left of the equal sign, we start by applying the square root on both sides of the equality, and then on isolating the unknown:
Therefore there are two solutions:
a) , and
b)
Let's solve your equation step-by-step.
<span><span><span>−<span>x^2</span></span>−<span>2x</span></span>=5
</span>Step 1: Subtract 5 from both sides.
<span><span><span><span>−<span>x^2</span></span>−<span>2x</span></span>−5</span>=<span>5−5
</span></span><span><span><span><span>−<span>x^2</span></span>−<span>2x</span></span>−5</span>=0
</span>Step 2: Use quadratic formula with a=-1, b=-2, c=-5.
<span><span><span><span>
</span></span></span></span><span>x=(<span><span>2±<span>√<span>−16)/</span></span></span><span>−<span>2</span></span></span></span>