Unit 1 Lesson 1.07: Unit Test (Part 2) September 10, 2021 NAME
DATE
Points (12)
Be sure to SHOW YOUR WORK
*This must be printed out and handwritten to be accepted!
1.) Using Desmos or linear combination method on a scratch piece of paper, solve the system of equations
below. State your answer in the form (x, y, z). In the area below prove mathematically this answer is
correct. All steps need to be shown to earn full credit. (6 points)
2x – y + z = 7
2x + 4y – 2z = 0
x - y + 3z = 2

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75

6-3=3

3*3=9

9+12=21

21/3=7

7*8=56

56 is your answer