Answer:
third answer is correct
Step-by-step explanation:
hello,
we need to compute
5*(-1)+(-2)*(-1)=-5+2=-3
-6*(-1)+(2)*(-1)=6-2=4
so the correct answer is
-3
4
hope this helps
Using the together rate, it is found that they would prepare the solution in 1.71 minutes working together.
<h3>What is the together rate?</h3>
It is the sum of each separate rate.
In this problem, the rates are given by:
Hence the together rate is given by:



7x = 12
x = 12/7
x = 1.71.
They would prepare the solution in 1.71 minutes working together.
More can be learned about the together rate at brainly.com/question/25159431
#SPJ1

<em>Find the gradient of the line joining (-1,9) and (3,5)</em>
<em />
Use the slope formula:-

Replace the letters with the numbers:-

On simplification,

On further simplification,


<h3>Good luck with your studies.</h3>

Answer:
x=16
y= 100
Step-by-step explanation:
<1 and <3 are vertical angles so they are equal
5x = 80
Divide each side by 5
5x/5 = 80/5
x = 16
Angles 2 and 3 are supplementary since they form a straight line, they will add to 180
<2 + <3= 180
y+80 = 180
Subtract 80 from each side
y+80-80 = 180-80
y= 100