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ddd [48]
2 years ago
14

Quick answer this question whoever gives correct answer gets brainliest

Mathematics
1 answer:
liq [111]2 years ago
8 0

Answer:

50 envelopes for 2.49

Step-by-step explanation:

2.49/50= .05

5.50/90= .06

 the first per is less than the 90 envelopes one therefore the answer is 50 for 2.49

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Which expression represents exponential decay
Lelu [443]

Given:

The exponential equations in the options.

To find:

The equation which represents exponential decay.

Solution:

The general exponential equation is

y=ab^x

where, a is initial value and b is growth rate.

If b<1, then it is an equation of exponential decay.

If b>1, then it is an equation of exponential growth.

In option A, b=31>1, i.e., exponential growth.

In option B, b=3.1>1, i.e., exponential growth.

In option C, b=0.13<1, i.e., exponential decay.

In option D, b=1.03>1, i.e., exponential growth.

Only y=10(0.13)^x represents exponential decay.

Therefore, the correct option is C.

5 0
3 years ago
The area of a rectangle is 30+12x what are 3 possibilities for the length and width of the rectangle
Stolb23 [73]

In order to find the three possibilities, you must first think of common factors between 30 and 12:

Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

Factors of 12: 1, 2, 3, 4, 6, 12

We can find three common factors between the two numbers: 2, 3, and 6. So these are three widths that we can use. The length can be found by factoring out the numbers from 30+12x (we can't factor out x):

30+12x=2(15+6x)      Width: 2      Length: 15+6x

20+12x=3(10+4x)      Width: 3      Length: 10+4x

20+12x=6(5+2x)       Width: 6      Length: 5+2x

4 0
3 years ago
Part B: Describe how you can make the line of best fit. Write the approximate slope and y-intercept of the line of best fit. Sho
GaryK [48]
We are using a line regression tool to solve the parameters asked in the problem. We can use online tools or that of Excel. According to the tool, the best fit values are 
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</span><span>Y-intercept0.6053 ± 0.6370
</span><span>X-intercept-1.573
</span><span>1/Slope<span>2.598

Best fit lines make sure that the standard deviation at each point is minimum from the best fit line.</span></span></span>
7 0
3 years ago
What is the factorization of 4x^2-8x+3
daser333 [38]
The answer is (2x-1)(2x-3)
3 0
3 years ago
Solve the equation 3+2/5x=11-2/5x using at least two different sequences of steps. Show your work for each step.​
Rina8888 [55]
First combine like terms ,
5/5x=9/5x
move the variable which will cancel out because it is the same
5=9 is no solution sorry if i’m wrong lol
4 0
3 years ago
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