64%, because 40% of 60% is 24%, and 2 mg of pure copper is 40% of the overall alloy, so add 24 and 40
In the dimension of the frisbee given to be 10.2 inches in diameter, there are three significant figures. All, from 1, 0 and 2. Since these values are all significant, the last digit determines the greatest possible error allowed that is only in the tenths digit. The circumference of the frisbee is calculated through the equation,
C = πD
Substituting,
C = π(10.2 in) ≈ 32.0 in
Answer:
last one
Step-by-step explanation:
D
Answer:
Step-by-step explanation:
Example
With numbers
18+4=22
18+4−4=22−4
18=18
With variables and numbers
x+4=22
x+4−4=22−4
x=18
We subtract 4 from both sides. Example
Which of the following numbers is a solution to the equation? x = 2, 7, or 8?
14−x=7
Here you are given the numbers 2, 7 and 8. One of these numbers will satisfy the equation. If you don't know the solution right away, you can investigate which of the given numbers gives results in the correct answer by plugging in the different values of x.
Answer: x=7
Example
8x=64
8⋅x=64
Which number should you multiply 8 by to get a product of 64? By using the multiplication table, we know that the number is 8.
8⋅8=64
When we solve an equation, we figure out what value of x (or any other variable) makes the statement true (satisfies the equation).
Answer:
x=12
y=20
Step-by-step explanation:
<u>the</u><u> two</u><u> triangles</u><u> are</u><u> congruent</u><u> </u>
according to the question
x+18=6x-42
6x-x=18+42
5x=60
x=12
if two triangles are congruent the included Angeles are equal
so
y+22=3y-18
3y-y=22+18
2y=40
y=20
