Answer:
Her equation system is incorrect
Step-by-step explanation:
Remember that
1 dime=$0.10
1 quarter=$0.25
Let
x------> the number of quarters
y-----> the number of dimes
we know that
0.25x+0.10y=20.70 ------> equation A
x=10+y -----> equation B
Her equation system is incorrect, because in her second equation she exchanged the variables, using x instead of y and y instead of x.
Answer:
56/29
Step-by-step explanation:
Let's solve your equation step-by-step.
2−6(−5a+6)=a+22
Step 1: Simplify both sides of the equation.
2−6(−5a+6)=a+22
2+(−6)(−5a)+(−6)(6)=a+22(Distribute)
2+30a+−36=a+22
(30a)+(2+−36)=a+22(Combine Like Terms)
30a+−34=a+22
30a−34=a+22
Step 2: Subtract a from both sides.
30a−34−a=a+22−a
29a−34=22
Step 3: Add 34 to both sides.
29a−34+34=22+34
29a=56
Step 4: Divide both sides by 29.
29a
29
=
56
29
a=
56
29
Answer:
Al comienzo Juana tiene 28 libras de azúcar.
Ella hace 6 paquetes de 2.5kg cada paquete.
Entonces, entre los 6 paquetes, hay:
6*2.5kg = 15kg de azúcar.
Ahora el problema es que tenemos dos unidades distintas, kilogramos y libras.
Aca podemos usar la relación:
1k = 2.2lb.
Entonces 15kg de azúcar son 15 veces 2.2 libras:
15kg = 15*2.2lb = 33lb.
Esto nos da mas de lo que hay originalmente en el costal.
Ahora si lo pensamos como:
Solo vendió 5 paquetes de 2.5kg, entonces el sobrante queda en el costal inicial:
5*2.5kg = 12.5kg
De vuelta, 1kg = 2.2lb
12.5kg = 12.5*2.2lb = 27.5lb
En este caso hay un sobrante de:
28lb - 27.5lb = 0.5lb
Compatible numbers are close to actual numbers, but easier to solve.
So instead of: 326 : 44,
we will do: 320 : 40 = 8
And we know that the real result is:
326 : 44 = 7.4
Answer:
B ) 320 divided by 40 is 8.
Answer is
<span>C. (-8,-5)
y - y1 = m( x - x1)
so
</span><span>y + 5 = 2(x + 8)?
</span>in this case y1 = -5, x = -8