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Kay [80]
2 years ago
12

Please help me

Mathematics
1 answer:
larisa [96]2 years ago
6 0

Answer: C

Step-by-step explanation:

They are substituting PQ=25 from steps 1 and 3.

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What is the inequality shown?
Lady bird [3.3K]

It shows the interval

[-2,8) or -2≤x<8

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2 years ago
Solve for variable its in pre algebra
Natalka [10]

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7

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7

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3 years ago
If a student has an average exam score between 70 and​ 79, he will earn a grade of C in his algebra course. Suppose he has three
goldenfox [79]

Answer:

(64,86.5)

Step-by-step explanation:

find the case where he gets 70 and the case where he gets 79

if his average is 70:

(75+62+85+2x)/5=70

(222+2x)/5=70

222+2x=350

2x=128

x=64

if his average is 79:

(75+62+85+2x)/5=79

(222+2x)/5=79

222+2x=395

222+2x=395

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7 0
3 years ago
Given f(x) = 4x + 2, find f-1(3).
Alexxandr [17]

Answer:

  1/4

Step-by-step explanation:

The inverse function tells you the input value that corresponds to the given output value of the function.

<h3>Application</h3>

You want f^-1(3), which is the value of x such that f(x) = 3.

  f(x) = 3 = 4x +2

  1 = 4x . . . . . . subtract 2

  1/4 = x . . . . . divide by 4

The inverse function of 3 is 1/4:

  \boxed{f^{-1}(3)=\dfrac{1}{4}}

4 0
2 years ago
What is the domain of the function y= square root of X plus 4​
kumpel [21]

Answer: all real numbers

Step-by-step explanation:

the domain for any function is always, all real numbers or in other words, negative infinity to positive infinity.

5 0
4 years ago
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