8 kg of potatoes and 5 kg of carrots cost $28 whereas 2 kg of potatoes and 3 kg of arrot cost $11.20.what is the cost of 1 kg of each item

Answers

Answer 1

Answer: 1 kg of potatoes costs x, 1 kg of carrots costs y.

8x+5y=28 | :(-4)
2x+3y=11,2

-2x-1,25y=-7
2x+3y=11,2

3y-1,25y=11,2-7
1,75y=4,2
y=2,4

1 kg of carrots costs $2,4.

1 kg of potatoes costs:
2x+3*2,4=11,2
2x+7,2=11,2
2x=11,2-7,2
2x=4
x=2
1 kg of potatoes costs $2

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For which value of O is sin O= -1

Answers

Answer:

O = 2 π n - π/2 for n element Z

Step-by-step explanation:

Solve for O:

sin(O) = -1

Hint: | Eliminate the sine from the left hand side.

Take the inverse sine of both sides:

Answer: O = 2 π n - π/2 for n element Z

assuming you meant sin(θ) = -1, Check the picture below.

How to find out how many cubes it takes? Can someone explain to me how to do the how many cubes does it take thing?Example:
Kayla stacked her cubes to make this rectangular prism.

How many cubes did Kayla use?

Answers

In this case, you simply count how many cubes are in the length, width, and height and multiply them together. In the example problem, the answer is 75 blocks because the dimensions are 5 x 5 x 3.

HELP MEEEEE

Write 77% as a decimal.

Answers

Answer:0.77

Step-by-step explanation:

77% as a decimal is 0.77 hundredths

Which expression is equivalent to (82)–4?

Answers

8 to the second power is closer to 82-4

Henry and 28 classmates go to the roller skating rink . Each van can hold 11 students . If all of the vans are full except one how many students are in the van not full

Answers

Answer: 7

Step-by-step explanation:

Given:Henry and 28 classmates go to the roller skating rink .

⇒ Total classmates=1+28=29

Capacity of van=11 students

To find the number of students are in van which is not full, we need to divide total students by capacity of van

On dividing 29 by 11 we get,

Quotient=2, Remainder=7

As 29=2×11+7

Therefore number of vans which are full =2

the number of students remains after 2 van which are full=7

⇒ The number of students are in the van not full=7

you divide 29:11= 2 7/11
so you have 2 full vans and one with 7 students.
so the answer is 7

Plz help i beg i will give 20 points and give brainlist ALEX tried to find the value of x. FIND HIS ERROR AND CORRECT IT.

Answers

it’s a 90 degree angle. So the equation so be 28+2x =90 and find x from there.

28+2x=90
-28 -28
2x= 62
x=31

His error was he put 180 rather than 90 because it’s and acute angle so the number you minus by would be 90 done and then you finish the equation like he did

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