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Elena L [17]
4 years ago
7

Need help on 3 and 4 thx!

Mathematics
1 answer:
Pani-rosa [81]4 years ago
6 0
Question 3 would be 18 times 12=216 times 5 as a pyramid has 5 faces=1080 Answer is D
Question 4 is A because 8 times 3 is 24 and 8 times 4 is 32.
I hope this was helpful
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What equashion can be used to find two numbers those ratio are 3 to 2 and have the sum of 35
Tems11 [23]

We need to set up a system, rather than a single equation, because there are two variables involved.

The first equation represents the fact that the two numbers are in a 3:2 ratio:

\dfrac{x}{y}=\dfrac{3}{2} \iff x=\dfrac{3}{2}y

The second equation represents the fact that their sum is 35:

x+y=35

So, we have the following system:

\begin{cases}x = \dfrac{3}{2}y\\x+y=35\end{cases}

Using the expression for x in the first equation, the second one becomes

x+y=35 \iff \dfrac{3}{2}y+y=35 \iff\dfrac{5}{2}y=35 \iff 5y=70 \iff y = 14

which implies

x=35-y=35-14=21

7 0
3 years ago
The table shows a person saving money at a constant rate. How much is this person saving per week?
padilas [110]

Answer:

We conclude that the person is saving $60 dollars per week.

Hence, option C is true.                        

Step-by-step explanation:

Given the table chart

Week                   Saving Money

2                           60

4                           120

6                           180

8                           240

We know to determine the slope to find the rate of change.

Taking the points (2, 60) and (4, 120)

Rate of change = Slope =  [y₂ - y₁] / [x₂ - x₁]

                                        = [120 - 60] / [4 - 2]

                                        = 60 / 2

                                        = $30 dollars per week

Now, taking the points (4, 120) and (6, 180)

Rate of change = Slope =  [180 - 120] / [6 - 4]

                                        = [60] / [2]

                                        = $30 dollars per week

Now, taking the points (6, 180) and (8, 240)

Rate of change = Slope =  [240 - 180] / [8 - 6]

                                        = [60] / [2]

                                        = $30 dollars per week        

  • This concludes that the rate of change is contant i.e. $30 dollars per week

Therefore, we conclude that the person is saving $60 dollars per week.

Hence, option C is true.                        

3 0
3 years ago
Negative four times a number plus 7 is no more than the number minus 25
sveta [45]
-4×x+7 ≤ x-25
-4x+7≤x-25
-7 -7
-4x≤-32
÷-4 ÷-4
x≤8
8 0
3 years ago
Zelma buys p pounds of bananas for 40 cents per pound. She pays the clerk with a twenty-dollar bill. The clerk subtracts the tot
Arada [10]

Answer: <u>C. 20-.40p</u>

Step-by-step explanation:

We know that from the given information that each pound is worth 40 cents, and that its being subtracted from the twenty dollar bill.  

"Why are the others choices wrong?"

A. p-20, isn't the proper equation due to the stated information.

B. B. 20 -40p, this equation has Zelma pay $40 dollars each pound, which isn't correct due to what the text has stated ("for 40 cents per pound").

D. 40p-20, from the given text, this equation is wrong ("She pays the clerk with a twenty-dollar bill), it never states that she will be charged twenty dollars, or be given forty for each pound.

Another person who asked the same question:

brainly.com/question/9419974

8 0
2 years ago
Find the slope of the above line.
expeople1 [14]
The answwe is undefined slope there is no slope 
6 0
3 years ago
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