Question

can someone please help me?!! ill medalll

Answer 1

The work of a student to solve a set of equations is shown:

Equation A: y = 4 – 2z
Equation B: 4y = 2 – 4z

Step 1: –4(y) = –4(4 – 2z) [Equation A is multiplied by –4.]
4y = 2 – 4z [Equation B]
Step 2: –4y = 4 – 2z [Equation A in Step 1 is simplified.]
4y = 2 – 4z [Equation B]
Step 3: 0 = 6 – 6z [Equations in Step 2 are added.]
Step 4: 6z = 6
Step 5: z = 1


In which step did the student first make an error?



Step 1
Step 3
Step 4
Step 2

Answer 2

I think it's step 2

Answer 3

Correct, the -4 needs to be distributed as a multiplier of 4 and -2z, right?

Answer 4

yupp thats what I thought too

Answer 5

thank you for helping!!

Answer 6

Thanks for asking,

remember $$\Huge a(b+c)=ab+ac$$

:-)

Answer 7

do you mind correcting another question? @skullpatrol

Answer 8

Sure

Answer 9

Wilson is 6 years older than Mary. Wilson's age is 10 years less than five times Mary's age. The equations below model the relationship between Wilson's age (w) and Mary's age (m):

w = m + 6
w = 5m – 10

Which is a possible correct method to find Wilson's and Mary's ages?



Solve w + 6 = 5w – 10 to find the value of w.
Write the points where the graphs of the equations intersect the x axis.
Solve m + 6 = 5m – 10 to find the value of m.
Write the points where the graphs of the equations intersect the y axis.

Answer 10

I chose C ^^

Answer 11

thank you again!! I was confused on this but you saved me omg

Answer 12

Correct, and then with that value of m find w in one of the given equations.

Answer 13

Good job!