If f(x)=0.5^x+1, evaluate f(-2).

Mathematics

1 answer:

Zolol [24]3 years ago

3 0

If f(x)=0.5^x+1, then f(-2) is 5.

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Substitute y=-6x-3 y=-x+2

MrRissso [65]

-6x-3= -x+2
-5x=5
x=-1

4 0

3 years ago

Help please, tank u :)

elena-s [515]

Answer:

16 ft

Step-by-step explanation:

Let the width of the rectangle be x ft

Therefore, length = (x + 2) ft

Area of the rectangle = 15 square ft

$x(x + 2) = 15 \\ \\ {x}^{2} + 2x = 15 \\ \\ {x}^{2} + 2x - 15 = 0 \\ \\ {x}^{2} + 5x - 3x - 15 = 0 \\ \\ x(x + 5) - 3(x + 5) = 0 \\ \\ (x + 5)(x - 3) = 0 \\ \\ x + 5 = 0 \: or \: \: x - 3 = 0 \\ \\ x = - 5 \: \: or \: \: x = 3 \\ \\ \because \: x \: can \: not \: be \: - ve \\ \\ \therefore \: x = 3 \\ \\ \implies \: x + 2 = 3 + 2 = 5 \\ \\ perimeter \: of \: rectngle \\ = 2(5 + 3) \\ = 2 \times 5 \\ = 16 \: ft$

5 0

3 years ago

PLEASE HELP ME WITH THIS AND EXPLAIN :)

PSYCHO15rus [73]

So first, you need to find the y intercept and slope of the line/function.
then, you just plug it in to y=mx+b form
this one would be:
slope of -5/4
y intercept: 2
so it would be y=-5/4+2

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3 years ago

A shop advertised a 27% off sale. If a coat originally sold for 253 , find the decrease in price and the sale price

OverLord2011 [107]

253 * 0.27= 68.31 (discounted price)

253-68.31 OR 253*0.73= 184.69 (sale price)

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4 years ago

What is the interval notation for -3<x<4

kvv77 [185]

That would be (-3, 4)

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3 years ago