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ipn [44]
3 years ago
7

Wich is a better deal, a bag of sand witch is 60 pounds for $5 or B a bag of sand witch is $12 for 150 pounds?

Mathematics
1 answer:
kodGreya [7K]3 years ago
5 0
1) find unit rate of both bags

60/5 = 12pound per dollar

150/12 = 12.5pounds per dollar

2) Comparing

12 (A) < 12.5 (B)

Therefore, B is a better deal
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Which of the following expressions is equivalent to a9 - b9?
irina1246 [14]
When you have the power multiplied to another power you have to multiply 
so 
(a^3)^3 - (b^3)^3 = a^9 - b^9

A is correct. 

B is incorrect because when you multiply the exponents you get a^18 - b^18 

C is incorrect because when you distribute the 2 you get a^6 - b^6 

D is correct too

8 0
3 years ago
A spinner has 1212 ​equal-sized sections. ThreeThree of the sections are purplepurple. a. What is the probability that the spinn
Vikki [24]

Answer:

(a) 1/4

(b) answer in explanation

Step-by-step explanation:

In this question, we are told that we have a spinner and the spinner has 12 equal sized sections with three of the sections purple in color. We are now asked to calculate the probability of the spinner landing on the color purple.

Checking, we can see that this is a probability question. The spinner has the options of stopping at 12 different positions but amongst these 12 positions, 3 of the positions are painted purple. We now need to know the probability of the spinner landing on purple.

To get the probability of this, what we simply do is to divide the number of purple options by the total number of outcomes we have. The number of purple options is 3 while the total outcome we have is 12. The probability is thus P(of purple is) = 3/12 = 1/4

(b) we are asked to use words to describe the probability

From the probability in the question, what we can see is that if the spinner is spinner 4 different times, there is a chance that 1 out of all the chances will produce a result where we have the spinner landing on one of the purple color section.

What this actually means is that there is a 25% chance within every spin for the spin to land in the purple color section of the spinner

7 0
3 years ago
Which function is the inverse of f(x) = -5x-4?
tankabanditka [31]

Step-by-step explanation:

f(x) =  - 5x - 4

\:

<u>Inverse</u>

y =  - 5x - 4

x =  - 5y - 4

x + 4 =  - 5y

y =  -  \frac{(x + 4)}{5}

{f}^{ - 1} (x) =  -  \frac{(x + 4)}{5}

4 0
3 years ago
Please help me solve this short problem guys
-BARSIC- [3]

Answer:

Step-by-step explanation:

Given equation of the quadratic function is,

y = x² + 5x - 7

Convert this equation into vertex form,

y = x² + 2(2.5x) - 7

  = x² + 2(2.5x) + (2.5)² - (2.5)² - 7

  = (x + 2.5)²- 6.25 - 7

  = (x + 2.5)² - 13.25

Therefore, vertex of the function is → (-2.5, -13.25)

For the solutions,

y = 0

(x + 2.5)² - 13.25 = 0

x = (±√13.25) - 2.5

x = (±3.64) - 2.5

x = 1.14, -6.14

Solutions → (-6.14, 0) and (1.14, 0)

8 0
3 years ago
938 divided by 7, pls give the solution too​
stellarik [79]

Answer:

134

Step-by-step explanation:

938÷7=134

8 0
2 years ago
Read 2 more answers
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