Solve for x. 10x^2=29x-21 does anyone know this

Using matrices to solve, the number of calories that are in 1 serving of milk is; 110 Calories

How to solve Linear Programming problems?

Let the calories in one serving of milk be x

Let the calories in one serving of juice be y

Let the calories in one serving of soda be z

Thus, for Joe, equation to show amount of calories is;;

2x + y + z = 530    -----(1)

For Darius, equation to show amount of calories is; ;

x + 2y = 370     ------(2)

For Marian, equation to show amount of calories is;

3x + z = 510    ------(3)

Using matrix calculator online to calculate this 3 equations, we have;

x = 110 calories.

Read more about Linear Programming at; brainly.com/question/23414950

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Answer:

the answer is B on ed2020

Step-by-step explanation:

for answer b, if you subtract 330 from 510 you get soda = 180 cal. then if you subtract 110 from 370 you get 260, and 260 divided by two (he consumed 2 juice) equals 130.

so you have soda = 180 cal and juice = 130 cal

if you plug it into joe's calorie intake you do 130 (1 serving of juice) + 180 (1 serving of soda) and + 220 (two servings of milk) you get 530 which is joe's total calorie intake in liquids, so B (110) is correct

Answer:

A

Step-by-step explanation:

Remark

The trick here is convert what you have to Ax + By = C

Solution

Given

y - 3 = 1/2 ( x + 6)                        Multiply both sides by 2

Solve

• 2(y - 3) = 2 * 1/2 (x + 6)               Do the multiplication
• 2(y - 3) = x + 6                            Remove the brackets
• 2y - 6 = x + 6                              Add 6 to both sides.
• 2y - 6 + 6 = x + 6 + 6                  Combine
• 2y = x + 12                                   Subtract x from both sides.
• -x + 2y = x - x + 12                       Combine
• -x + 2y = 12

Answer

• A = - 1
• B = 2
• C = 12

or

• When you multiply through by - 1 you get x - 2y = - 12 which is A

Answer: the number of tickets that Olga bought is 5

Step-by-step explanation:

Let x represent the number of tickets that Olga bought.

Olga buys tickets to a concert. She pays $27.75 for each ticket, plus handling fee of $5.50 for The order. This means that the total amount that Olga paid for x tickets would be

27.75x + 5.5

If the total cost is $144.25, the equation representing the situation would be expressed as

27.75x + 5.5 = 144.25

27.75x = 144.25 - 5.5

27.75x = 138.75

x = 138.75/27.75

x = 5