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Kisachek [45]
2 years ago
13

HELP PLEASE!!!

Mathematics
1 answer:
Stells [14]2 years ago
5 0
140cm. I hope this is correct. Please mark brainilest if it is! Have a great day!
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Pls help me with this question
igor_vitrenko [27]

Answer:

D, C

Step-by-step explanation:

for part a, there is a negative slope with the graph shifted two units upwards

for part b, if you plug in C, you get an answer that works

8 0
2 years ago
The ratio of boys to girls at a movie is 4:7. If there are 21. girls, how many boys are
IrinaVladis [17]

Answer:

12

Step-by-step explanation:

7*3=21 so 4*3=12

3 0
3 years ago
Please help with explanation and pleasedo let me know about the method ( 9a,b 10a)
worty [1.4K]

Answer:

Hope this helps

Step-by-step explanation:

Crossproduct is explained. You can use it to get all the values as well as being able to convert into other currencies.

6 0
2 years ago
The price of products may increase due to inflation and decrease due to depreciation. Marco is studying the change in the price
likoan [24]

Answer:

A)  3%

B)  Product A

Step-by-step explanation:

<u>Exponential Function</u>

General form of an exponential function: y=ab^x

where:

  • a is the initial value (y-intercept)
  • b is the base (growth/decay factor) in decimal form
  • x is the independent variable
  • y is the dependent variable

If b > 1 then it is an increasing function

If 0 < b < 1 then it is a decreasing function

<u>Part A</u>

<u>Product A</u>

Assuming the function for Product A is <u>exponential</u>:

f(x) = 0.69(1.03)^x

The base (b) is 1.03.  As b > 1 then it is an <u>increasing function</u>.

To calculate the percentage increase/decrease, subtract 1 from the base:

⇒ 1.03 - 1 = 0.03 = 3%

Therefore, <u>product A is increasing by 3% each year.</u>

<u>Part B</u>

\sf percentage\:change=\dfrac{final\:value-initial\:value}{initial\:value} \times 100

To calculate the percentage change in Product B, use the percentage change formula with two consecutive values of f(t) from the given table:

\implies \sf percentage\:change=\dfrac{10201-10100}{10100}\times 100=1\%

Check using different two consecutive values of f(t):

\implies \sf percentage\:change=\dfrac{10303.01-10201}{10201}\times 100=1\%

Therefore, as 3% > 1%, <u>Product A recorded a greater percentage change</u> in price over the previous year.

Although the question has not asked, we can use the given information to easily create an exponential function for Product B.

Given:

  • a = 10,100
  • b = 1.01
  • n = t - 1 (as the initial value is for t = 1 not t = 0)

\implies f(t) = 10100(1.01)^{t-1}

To check this, substitute the values of t for 1 through 4 into the found function:

\implies f(1) = 10100(1.01)^{1-1}=10100

\implies f(2) = 10100(1.01)^{2-1}=10201

\implies f(3) = 10100(1.01)^{3-1}=10303.01

\implies f(4) = 10100(1.01)^{4-1}=10406.04

As these values match the values in the given table, this confirms that the found function for Product B is correct and that <u>Product B increases by 1% per year.</u>

4 0
2 years ago
jennifer is shopping with her mother they pay $2 per pound for tomatoes at the vegetable stand. find the constant of proportiona
Tresset [83]
One the first problem on finding the constant of <span> proportionality in this situation the answer is 2. Below is the solution:

constant = unit rate
unit rate = $2/ poung 
K = 2

For the second question, the equation is the below:

T = 2p or y = 2x</span>
3 0
3 years ago
Read 2 more answers
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