Question

help me please 10th grade math

Answer 1

Question 1 (Multiple Choice Worth 2 points)

Solve the system of equations by substitution. What is the solution for x?

2x + y = 1
4x + 2y = −2

x = 0

x = 2

There is no x value as there is no solution.

x can be any value as there is an infinite number of solutions.

Question 2 (Multiple Choice Worth 1 points)

Stable High School has a total of 112 boys and girls who play sports. If the number of boys, b is 16 more than twice the number of girls, g, how many boys play sports at this high school?
Which system of equations would help you solve this problem?

b + g = 112
b = 2g + 16

b + g = 112
g = 2b + 16

b − g = 112
b = 2g − 16

None of the systems above would solve this problem.

Question 3 (Multiple Choice Worth 2 points)

Solve the following system of equations:

x − 2y = 14
x + 3y = 9

(1, 12)

(−1, −12)

(12, −1)

(12, 1)

Question 4 (Essay Worth 5 points)

Part 1:
If you were solving a system of equations and you came to a statement like 4 = 4, what do you know about the system?
Part 2:
Solve the following system and show all of your work.
3y − 2x = 11
y + 2x = 9

Answer 2

you jz want to know how to get to the answer?

Answer 3

i would like help understand these questions with answers please :)

Answer 4

I explain question by question
1.
from 1st eq we know that x=(1+y)/2
sub into eq 2 we get 2-2y+2y=-2
we get 2=-2
It is impossible so there is no solution for x.

Answer 5

ok

Answer 6

Question 2
Stable High School has a total of 112 boys and girls who play sports.
We get B+G=112
the number of boys, b is 16 more than twice the number of girls, g,
We get another eq
B+16=2G or B=2G+16
Obviously there is no equation that can solve that question

Answer 7

oops
typing error

Answer 8

B=2G-16 not +

Answer 9

thanks for the help so far trying to finish quickly and study at the same time

Answer 10

so did you still need me to explain the question left?

Answer 11

Question 3
using 1st equation minus 2nd equation
we get -2y-3y=14-9
solve for y then using the value y sub into any equation u will get value of x
Note:
the coordinate form is (x,y)

Answer 12

yes i do

Answer 13

Question 4 Part 1:
The system of the of equation has it's solution.
Part 2
Add the 2 equation together
you will get 4y=20.
similar as question 3
Get y and sub into any equation then you will found the value of x.

Answer 14

how do i do this? ''Get y and sub into any equation then you will found the value of x''

Answer 15

For Question 4 Part 2
Get y
4y=20__y=5
sub into y+2x=9
5+2x=9
2x=4
x=2

Answer 16

what is the __ sorry for all the questions i just want to make sure i am able to do the exam

Answer 17

sorry that is typing error it should be in next line

Answer 18

oh ok

Answer 19

thanks you were a huge help