Let x = cups of 11% wheat, and y = cups of 63% wheat
He wants 12 cups in total, so we need:
x + y = 12
These 12 cups need to have 50% wheat, which means we are looking at 12*.5 = 6 cups of wheat in total, so our second equation is:
.11x + .63y = 6
We have two equations and two variables. So we can solve by using any means you want. I used substitution:
x = 12 - y
.11(12-y) + .63y = 6
1.32 -.11y + .63y = 6
.52y = 4.68
y = 9
Which means x = 3
Thus, 3 cups of 11% and 9 cups of 63%.
Responder:
$ 2.5 y $ 3
Explicación paso a paso:
Paso uno:
datos dados
Sea xey el costo por libra de chispas de chocolate y nueces, respectivamente
por lo tanto
2x + 5y = 20 ------ 1
y
8x + 3y = 29 ------ 2
resolviendo 1 y 2 simultáneamente tenemos
2x + 5y = 20 (multiplicar la ecuación por 4)
8x + 20y = 80 ------------- 3
restar eqn 2 de 3
8x + 20y = 80 ------------- 3
8x + 3y = 29 ----------------- 2
0 + 17 años = 51
divide ambos lados por 17
y = 51/17
y = 3
El costo de las nueces por libra = $ 3
poner y = 3 en 8x + 3y = 29 ------ 2
8x + 3 (3) = 29 ------ 2
8x + 9 = 29
8x = 29-9
8x = 20
divide ambos lados entre 8
x = 20/8
x = 2,5
El costo del chocolate por libra = $ 2.5
D and E because they are both colder than -10
Answer:
Amy-24
Barry-21
Clarence-17
Step-by-step explanation:
Clarence is the youngest and so you add 4 to that to get Barry, add 3 more to that to get Amy.
Answer:
y = 4/5 x - 2 1/5
Step-by-step explanation:
1. Find the slope:
<u>1 - 5 </u> = <u> -4 </u> = <u> </u><u>4 </u>= m
4 - 9 -5 5
2. Find b by plugging in the slope you just found and one of the points given into y = mx + b
1 = 4/5 ( 4) + b
1 = 16/5 + b
- 2 1/5 = b
3. Plug in the m and the b you found into y = mx + b
y = 4/5 x - 2 1/5
