Step-by-step explanation:
0.25 = one quarter - 2/8
3/8 is spent on food
so this leaves 3/8 for savings
therefore we know that $18.27 is 3/8 of her total allowance
so
18.27 ÷ 3 = 6.09
6.09 × 8 = 48.72
thus her total allowance must have been $48.72
The system of equations are:
2x − 4y = 6
−3x + 3y = 9
To eliminate x, you should:
1. multiply first equation with 3
2. multiply second equation with 2
3. add the new equations you got
So your answer is A.
<span><u>3(x-6)=10x+3</u></span>
Expand the left side:
3x-18 = 10x + 3
Subtract 3x from each side:
-18 = 7x + 3
Subtract 3 from each side:
-21 = 7x
Divide each side by 7 :
<u>-3 = x</u>
We are given with the rate of change of the base, db/dt equal to 1 ft/ sec and the rate of change of the height of the triangle, dh/dt equal to 2 ft/sec. b is 10 ft and h is 70 ft. Area of triangle is equal to A= 0.5 bh The rate of change of the area is equal to dA/dt = 0.5 b dh/dt + 0.5 h db/dt. Substituting, dA= 0.5*10*2 + 0.5*70 * 1 equal to 45 ft2 / sec.
A fraction can compare the small parts of a whole, while it could also identify a division problem
