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2 years ago

Rewrite in interval notation: all real numbers that are greater than -22,

Mathematics

1 answer:

Naily [24]2 years ago

3 0

Answer:

Step-by-step explanation:

all real numbers that are greater than -22 : x > -22

interval notation: ]- 22 ; + ∞ [

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What is the answer______________________________________________________________________________

Alona [7]

Answer: 62

Step-by-step explanation:

You do 112-19-31 and then it equal = 62

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2 years ago

T increased by r the answer

erma4kov [3.2K]

So r is a number that when you add to t it will increase so its

T + r

8 0

2 years ago

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Which will have a higher effective interest rate — a payday loan for $1900 that is due in 14 days with a fee of $80, or a payday

Pie

Answer:

It's D.

Step-by-step explanation:

The shorter period loan has the same total interest for the same loan amount, so it has the higher effective interest rate: 80/12 is higher than 89/14.

6 0

3 years ago

What are the values of f(x) = 9^x when x= -2? a) 1/81 b) 81 c) 1/18 d) 18

Novosadov [1.4K]

Answer:

(a)

Step-by-step explanation:

using the rule of exponents

• $a^{-m}$ ⇔ $\frac{1}{a^{m} }$ , hence

$9^{-2}$ = $\frac{1}{9^{2} }$ = $\frac{1}{81}$ → (a)

4 0

2 years ago

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Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = −1. (2 points)

umka2103 [35]

Focus of the parabola is (-5,5) and directrix is y = -1.

Let's assume a point (x,y) on parabola.

According to definition of parabola, the distance between point (x,y) and focus (-5,5) would be same as the distance between the point (x,y) and directrix y = -1.

$\sqrt{(x+5)^2+(y-5)^2} = \sqrt{(y+1)^2} \\\\(x+5)^2+(y-5)^2=(y+1)^2 \\\\(x+5)^2 + y^2 - 10y +25 = y^2 +2y +1 \\\\(x+5)^2 = -y^2 +10y -25 + y^2 +2y +1 \\\\(x+5)^2 = 12y -24 \\\\12y = (x+5)^2 +24 \\\\ y = \frac{1}{12} (x+5)^2 +2$

Hence, option D is correct, i.e. f(x) = one twelfth (x + 5)2 + 2.

7 0

2 years ago

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