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:
Step-by-step explanation:
Let's assume that you have a sequence written out in always increasing or always decreasing order.
If each new term is equal to the previous term, plus a certain constant, then the sequence is arithmetic. Example: 2, 7, 12, 17, 22, ... (the additive constant is 5).
If each new term is equal to the previous term, multiplied by a certain constant, then the sequence is geometric. Example: 2, 8, 32, 128, ... (the multiplicative constant is 4).
If the spacing between terms is not a constant, then the sequence is neither arith. nor geom.
If all new adjacent terms are not found by multiplying the previous term by the same constant, the sequence is not geometric (and not arithmetic).
5 minutes x minutes
--------------- = -------------
4 dishes 24 dishes
using cross products
5 * 24 = 4 * x
divide each side by 4
5*24/4 = x
30=x
It will take 30 minutes
Answer: Your answer is C.
Step-by-step explanation: I'm taking this test rn and it's C. K12 anyone?
Answer:108 ins. squared
Step-by-step explanation:
So first you want to decide which way you want to divide the shape.
I am going to do it this way...
So the bottom is 16ins. and the top part is 10 ins.
So when you subtract 16-10 you get 6.
This means that the small portion sticking up is 6 ins. across.
According the left side the width with the small part is 8 ins.
So now we find the area of that half.
6 times 8 is 48ins.
Now we are going to get the other part.
The top says it is 10 ins.
The side says it is 6 ins.
Now we multiply 10 by 6 nd get 60 ins
We are almost finished, all we have to do is add 60 and 48.
Your answer is 108ins.squared.
