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3 years ago

Help pleasee 100 points

Mathematics

2 answers:

koban [17]3 years ago

7 0

rebrenta previous ly had 50 dollars

IrinaK [193]3 years ago

5 0

<span>
1. y=-4x+5
2. y=3x-8
3. Roberta had $50 before she started to save money each week.</span><span>

</span>

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I need algebra help.....

Lubov Fominskaja [6]

Answer:

$y=4(3)^x$

Step-by-step explanation:

From the table given in the question,

x y Difference Ratio

1 12 - -

2 36 36-12 = 24 $\frac{36}{12}=3$

3 108 108-36 = 72 $\frac{108}{36}=3$

4 324 324-108 = 216 $\frac{324}{108}=3$

5 972 972-324 = 648 $\frac{648}{216}=3$

There is a common ratio of 3 in each successive term.

Therefore, data given in the table will represent an exponential function.

$y=a(b)^x$

For a point $(1, 12),$

$12=a(b)^1$

$ab=12$ ------(1)

For another point of the table $(2,36)$ ,

$36=a(b)^2$

$ab^2=36$ --------(2)

Equation (2) divided by equation (1)

$\frac{ab^2}{ab}=\frac{36}{12}$

$b=3$

From equation (1),

$3a=12$

$a=4$

Therefore, exponential function will be,

$y=4(3)^x$

7 0

3 years ago

-4/5 to the power of 2 times -3/50

Crazy boy [7]

=(-4/5)^2 * -3/50
square -4/5 first; remember -4/5^2 is the same as -4/5 * -4/5

=(-4/5 * -4/5) * -3/50
multiply -4 numerators; multiply 5 denominators

=(-4 * -4)/(5 * 5) * -3/50

=16/25 * -3/50
multiply numerators 16 & -3; multiply denominators 25 & 50

=(16 * -3)/(25 * 50)
= -48/1250

simplify by 2
= -24/625 (or -0.0384)

ANSWER: -24/625 (or -0.0384)

Hope this helps! :)

6 0

3 years ago

Read 2 more answers

Distance Which expression could help you find the distance between (10, 4) and (–6, 4)? |10| + |–4| |10| + |4| |–6| + |4| |10| +

kenny6666 [7]

$\bf \boxed{(-6,4)}\stackrel{\textit{6 units}}{\rule[0.35em]{10em}{0.25pt}}0\stackrel{\textit{10 units}}{\rule[0.35em]{15em}{0.25pt}}\boxed{(10,4)}
\\\\[-0.35em]
~\dotfill\\\\
~\hfill |10|+|-6|~\hfill$