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777dan777 [17]
3 years ago
7

What is x over 5 equals 8 over 9?

Mathematics
1 answer:
julia-pushkina [17]3 years ago
3 0
X/5 = 8/9
this is a proportion, so we cross multiply
(9)(x) = (5)(8)
9x = 40
x = 40/9 or 4 4/9
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Does each equation represent exponential decay or exponential growth?
agasfer [191]

An exponential equation is represented as: \mathbf{y = ab^x}, where b represents rate

  • Exponential growth: \mathbf{y = 5(7)^x},  \mathbf{y = 3(4.2)^x} and \mathbf{y = 0.6(1.3)^x}
  • Exponential decay: \mathbf{k = 4.2(0.28)^x}
  • Neither: \mathbf{h(x) - 3x + 1.3}

An exponential equation is said to represent growth, if the rate is greater than 1, while it represents decay if the rate is less than 1.

This means that:

\mathbf{y = 5(7)^x},  \mathbf{y = 3(4.2)^x} and \mathbf{y = 0.6(1.3)^x} represent exponential growth because 5, 4.2 and 1.3 are greater than 1

Also,

\mathbf{k = 4.2(0.28)^x} represents exponential decay because 0.28 is less than 1

While

\mathbf{h(x) - 3x + 1.3} is not an exponential function

Read more about exponential functions at:

brainly.com/question/11487261

5 0
2 years ago
Please help! you'll get Brainliest if you do!
alisha [4.7K]

Answer:

b

Step-by-step explanation:

3 0
3 years ago
How does the greenhouse effect keep the Earth warm? The atmosphere
Salsk061 [2.6K]

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7 0
4 years ago
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What is the value of this expression (29+18)+(17-8) / 8
Vsevolod [243]
<h3>Answer:</h3>

48 1/8

<h3>Step-by-step explanation:</h3>

As written, it is evaluated as ...

... 47 + 9/8 . . . . . . . . parentheses are evaluated first

... = 47 + 1 1/8 . . . . . . then division

... = 48 1/8 . . . . . . . . then addition

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A decent calculator will evaluate this for you according to the order of operations. A Google or Bing search box will do that, too.

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3 years ago
Evaluate g(x)=6x when x=-3,0, and 4 .
hram777 [196]

Answer:

-3 = -18

0 = 0

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Step-by-step explanation:

-3... so 6(-3) equals -18 because a positive times a negative equals a negative

0... so 6 (0) equals 0 because anything multiplied by 0 equals 0

4... so 6 (4) equals 24

() means multiplied by so if it’s y(x) then that means y is multiplied by x :)

3 0
3 years ago
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