Answer:
(4,0)
Step-by-step explanation:
4x+2y=16
-4y+x=4
Multiply the first equation by 2
2(4x+2y)=16*2
8x +4y = 32
Add the 2nd equation
8x +4y = 32
x -4y =4
--------------------
9x =36
Divide each side by 9
9x/9 = 36/9
x=4
Now solve for y
-4y +x =4
-4y +4 = 4
Subtract 4 from each side
-4y +4-4=4-4
-4y =0
Divide by -4
-4y/-4 =0/-4
y=0
(4,0)
A. Addition and subtraction are opposites.
b. A number line shows where numbers are in relation to each other. It shows that 0 and 100 are farther apart than 0 and 10.
c. If the number is less than 0 or greater than 0. Less than 0 is negative and greater than 0 is positive.
Answer:
5a + 6b + 7
step-by-step explanation:
16 + 8a -3a + 6a -9: subtract 9 from 16
7 + 8a -3a + 6b Now subtract -3a from 8a
5a + 6b + 7 is the final answer.
The objective of the experiment is to see if the multivitamin improves short term memory. The population could be the set of all adults in a certain country. The experimental group is the group that gets the multivitamin, while the control group gets a placebo (often just a sugar pill). The groups are usually split 50/50 but they are not always entirely perfectly equal groups. One sample procedure would be to put names into a computer and have the names randomly selected, to determine who goes into the experimental group or the control group.
Answer:
2/3.
Step-by-step explanation:
Full revolution = 12 hours
11 - 3 = 8 hors
So it is 8/12 = 2/3 of a revolution.
