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Marizza181 [45]
3 years ago
8

Write the inequality in interval notation X is greater than or equal to negative 4

Mathematics
1 answer:
lana [24]3 years ago
4 0
Here is our inequality.
x \geq -4

Let's go from least to greatest, and add in infinity as our maximum.
-4 \leq x \ \textless \  \infty

Our interval notation would look like this.
[-4,\ \infty)
We put the lower bound, then the higher bound, using brackets instead of parentheses if x can also be equal to that value.
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9x²+bx+100 as a perfect square​
jok3333 [9.3K]

Step-by-step explanation:

9x²+bx+ 100

(3x)²+ bx + 10²

(3x)² + 10² + bx

(3x)² + 10² + bx

3 0
3 years ago
J.c. Penny sells a timed watch for $139.99 that cost$89.97. J.C. Penny’s percent of markup based on the selling price is:
vodka [1.7K]
So it cost them 89.97 and they're selling it for 139.99, the difference is 50.02.

so, the markup is 50.02, if we take 89.97 to be the 100%, how much is 50.02 off of that in percentage?

\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
89.97&100\\
50.02&p
\end{array}\implies\cfrac{89.97}{50.02}=\cfrac{100}{p}\implies p=\cfrac{50.02\cdot 100}{89.97}
5 0
3 years ago
Can someone solve this question?​
iren2701 [21]
It’s 26 bc it’s says it right there
5 0
2 years ago
A line passes through the point (0-1) and has a positive slope. Which of these points could that line pass through?
juin [17]

Answer:

(12,3) A

(-2,-5) B

(1,15) D

Step-by-step explanation:

Check Image below

8 0
3 years ago
The value of x in the equation log(x-1)9=2 is
mel-nik [20]
\log_{(x-1)} 9=2

the domain:
x-1 >0 \ \land \ x-1 \not=1 \\
x>1 \ \land \ x \not= 2 \\
x \in (1; 2) \cup (2;+\infty)

the equation:
\log_{(x-1)}9=2 \\
(x-1)^2=9 \\
\sqrt{(x-1)^2}=\sqrt{9} \\
|x-1|=3 \\
x-1=3 \ \lor \ x-1=-3 \\
x=4 \ \lor \ x=-2

4 is in the domain
-2 is not in the domain

The answer:
x=4

***
Also, the answer in 13 is {8}. -3 is not in the domain. Replace x with -3 and you'll see:
x=\sqrt{5x+24} \\
-3=\sqrt{5 \times (-3)+24} \\
-3=\sqrt{-15+24} \\
-3=\sqrt{9} \\
-3=3
It's not true so -3 isn't a solution to this equation.
4 0
3 years ago
Read 2 more answers
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