Answer:
b
Step-by-step explanation:
I mean I believe its b it looks like theres three
The best answer out of the ones provided would be c, confidence interval
Answer:
80 hours
Step-by-step explanation:
let d represent doug, let l represent laura
first, set up a system of equations representing the problem:
since doug spent 10 less than twice the hours laura did, and we know that the total amount of hours they spent together is 230:
l=2d+10
d+l=230
then solve:
*first i rearranged the equations so i can solve this system of equations using elimination method*
l-2d=10
l+d=230
*subtract*
3d=240
d=80
so, doug spent 80 hours in the lab
Answer:
27-14=c
Step-by-step explanation:
Also can you give brainliest to all of your questions bc it really hard to get brainliest and it be really nice you can choose who i dont really care but just please do it it helps a lot
assuming you mean y² = 169
then taking the square root of both sides gives
y = 
= ± 13
since 13² = 169 and (- 13)² = 169
