Answer:
I believe your answer is A
Hopefully I could help :)
Answer:
5:1 (answer c)
Step-by-step explanation:
Number right: 10
Number wrong: 2
Total number: 10 + 2 = 12
Ratio of right answers to number of wrong answers:
10/2 or 10:2, or (after reduction) 5:1
Explanation:
You want to first to substitute to form 3 equations.
5=4a+2b+c
12=9a+3b+c
-4=a-b+c
Now solve with whatever way you fell comfortable, I'm going to use elimination.
First eliminate c
7=5a+b
16=8a+4b --> 4=2a+b
Then I'll eliminate b,
3=3a
a=1
Now solve for b and c
7=5+b
b=2
1-2+c=-4
c=-3
Now for the equation:
y=x^2+2b-3
Hope this helps!
Samuel is constructing a triangle ABC with AB = 8 cm, BC = 10 cm and AC = 7 cm. To do this, he draws a line segment BC of length 10 cm and then an arc with B as centre, and radius 8 cm.
hope it helps you ♥️
Let the constant stretch factor be x
then
3x + 4x + 2x = 72 Add the left side.
9x = 72 Divide by 9
x = 72/9
x = 8
Therefore the sides are
8*3 = 24
8*4 = 32
8*2 = 16
Total = 72 which checks.
