Answer:
A
Step-by-step explanation:
a door is a rectangle so is can't be any of the other shapes
So, let's put the test scores in fractions. We need them to have a common denominator, so let's use 10.
5/10=b 2/10=a 3/10= c or below
I added up 5/10 and 2/10 and subtracted that from 10/10 because it represents the rest of the test scores. We need to find how many students are 3/10.
We could multiply 3/10 by 30. Or we could divide 30 by 10, and multiply that by 3. Either way, we get 9.
So, 9 students scored a c or below on the test.
12.325-(2.34x3.9)
12.325-(9.126)
3.199 ~3.2
Answer:
x = -1/4
Step-by-step explanation:
3/x = -4 - 8
3/x = -12
x= -3/12
x= -1/4
9514 1404 393
Answer:
y = 0.2·0.5^x
Step-by-step explanation:
The form of an exponential function is ...
y = a·b^x
If you look at the values of this for x=0 and x=1, you find ...
<u>For x=0</u>
y = a·b^0 = a·1 = a
The table tells us the corresponding value of y is 0.2, so ...
a = 0.2
<u>For x=1</u>
y = a·b^1 = ab
For the given value of a and the table value of y for x=1, we have ...
0.1 = 0.2·b
b = 0.1/0.2 = 1/2 = 0.5
Then the exponential function that describes the table is ...
y = 0.2·0.5^x