$\left \{ {{\frac{x}{2}-y=7 } \atop {-\frac{x}{7}+\frac{2y}{7}= -2 }} \right. \left \{ {{\frac{x}{2}.2-2y=2.7} \atop {-\frac{x}{7}.7+\frac{2y}{7}.7= -2.7}} \right. \left \{ {{x-2y=14} \atop {-x+2y=-14}} \right. \left \{ {{0x=0} \atop {y={\frac{x}{2}-7}} \right.$

ANSWER: B

ok done. Thank to me :>

8 0

3 years ago

Read 2 more answers

In a fruit cocktail, for every 30 ml of orange juice you need 45 ml of apple juice and 25 ml of coconut milk. What proportion of

aliina [53]

Answer:

9/20

Step-by-step explanation:

Add them:

30+45+25= 100ml

Apple juice = 45ml

45/100

9/20

Hope this helps!

8 0

3 years ago

A teacher would like to study how students' seating locations in the classroom affects their test scores. If he were

LUCKY_DIMON [66]

Answer:

B, C, D, maybe A

Step-by-step explanation:

7 0

4 years ago