MATHEMATICS HIGH SCHOOL

A salesperson at Crabby Crystal's Sea Life Store sells 2 fishing reels and 5 rods for $295. The next day, the salesperson sells 4 reels and 2 rods for $230. Find the cost of each. Write both equations and solve the system.

Answers

Answer 1

Answer:

Answer:

1 fishing reel costs $35

1 rod costs $45

Step-by-step explanation:

let the cost of fishing reels be f and the cost of rods be r

2f + 5r = 295 Equation1

4f + 2r = 230 Equation2

multiply Equation1 by -2

-2(2f + 5r = 295 )

-4f -10r = -590 Equation3

Add Equations 2 & 3

4f + 2r = 230

-4f -10r = -590

------------------------

-8r = -360

r = 45

substitute r = 45 to any of the equations

I use 2f + 5r = 295

2f + 5(45) = 295

2f + 225 = 295

2f = 70

f = 35

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Combine like terms.7 + 4x – 10x + 15 A.22 – 14x B.22 – 6x C.22 + 6x D.11x – 5x

What is the inverse of the function f(x) = x +3?A. h(x) =1/3 x + 3
B. h(x) = 1/3x – 3
C. h(x) = x – 3
D. h(x) = x + 3

Answers

Answer:

Option C is correct that is h(x)=x-3

Step-by-step explanation:

We have been given a function:

$f(x)=x=3$

$\text{let y}=f(x)$

$y=x+3$

$x=y-3$

Hence, $f^(-1)y=y-3$

Therefore, $f^(-1)x=x-3$

Hence, Option C is correct that is h(x)=x-3

f(x) = x + 3
y = x + 3
x = y - 3

Inverse is h(x) = x - 3

Mr ramirez bought 1/4 pounds of cashews he divided the cashews equally with 3 childern. how many cashews did each children get

Answers

Do:
1/4 divided by 3
Multiply by the reciprocal of 3 which is 1/3.
1/4 x 1/3= 1/12

Answer is 1/12 cashews

A bag has five red marbles, six blue marbles, and four black marbles. What is the probability of picking a blue marble, replacing it, and then picking another blue marble?A. 1/15
B. 8/75
C. 4/25
D. 1/9

Answers

The total number of marbles is 15. The probability of picking a blue marble is 6/15. After putting the marble back, the probability of picking another blue marble is probably 1/9.

Answer: the probability of picking two blue marbles in a row is 1/9.

Answer:

4/25 is the answer guys!

Step-by-step explanation:

The table gives the probabilities that new cars of different models will have brake failure. The car model that is least likely to have a brake failure is model , and the probability of brake failure for this model is %.Car Model Brake Failure
   in New Car
A 0.0065%
B 0.0037%
C 0.0108%
D    0.0029%
E    0.0145%
Total 0.0048%

Answers

All the information we have are the probabilities, and what we need is the lowest number: so let's choose the smallest probability among the numbers: 0.0065%, B 0.0037%,C 0.0108%,D 0.0029%, E 0.0145%. The smallest of the numbers is 0.0029% -it starts with two 00s and the number that follows, 2, is smaller than all there others - so the smallest probability is in option D - and the model would be the corresponding model (but we're missing some information here)

Answer:

Model D is least likely to have a brake failure.

Step-by-step explanation:

since when we will compare all the values of the probability of brake failure for the models in % by the following table:

Car Model Brake Failure

in New Car

A 0.0065%

B 0.0037%

C 0.0108%

D 0.0029%

E 0.0145%

Total 0.0048%

We will see that 0.0029% is the least percent among all the other entries.

Hence car model D is most likely to have a least chance of brake failure.

If (x-9) is a factor of 2x^2 - 19x + k, what is the value of k?

Answers

Answer:

Step-by-step explanation:

18 hope this help if it I’m sorry

2 trifles cost £7
how much do 6 trifles cost

Answers

Answer:

£21

Step-by-step explanation:

Use ratios! Amount of trifle: Amount of money

2:7

*3 *3

6:21

£21

Answer:

Step-by-step explanation:

multiply the cost by 3

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