9. Mario found the composite function (hºg)(x), where h(x) = 4 - - ž, and g(x) = 2x + 10.
State which step he made the error and explain the mistake he made in his reasoning,
(2x + 10)
Step 1: h(g(x)) = 4 -
2
Step 2: h(g(x)) = 4 - x + 10
Step 3: h(g(x)) = 14 - X
a. Step 1: 2(4 - Ž)+10
b. Step 2: h(g(x)) = 4 - x + 5
c. Step 2: h(g(x)) = 4 - x-5
d. no error

The mistake is in step 2

Step-by-step explanation:

We are given h(x)=4-x

Note: Considering h(x)=4-x as in question given there is some issue. If value of h(x) is different the answer would be different.

and g(x)=2x+10

We need to find h(g(x))

h(g(x)) can be found by putting the value of g(x) in h(x)

Steps used by Mario are:

Step 1: h(g(x)) = 4 - x

Step 2: h(g(x)) = 4 - x + 10

Step 3: h(g(x)) = 14 - X

She did mistake in step 2:

The step 2 should be:

h(g(x))=4-(2x+10)

h(g(x))= 4-2x-10

h(g(x))=-6-2x

So, the mistake is in step 2

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225