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navik [9.2K]
3 years ago
11

HURRY. NEED To be done by 10:30

Mathematics
2 answers:
Zepler [3.9K]3 years ago
7 0

Answer:

B) $822

Step-by-step explanation:

The total amount of money she spent can be found by adding her expenses:

312 + 287 + 112 + 111

Once added you get the total amount of:

$822

aleksley [76]3 years ago
5 0

Answer:

The answer is B.

Step-by-step explanation:

312+287=599

599+112=711

711+111=822

Option B is $822, so option B is the answer.

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Hank used 410 stamps. There are 60 stamps in every 3 rolls. How many rolls did Hank use?
Sveta_85 [38]

Answer:

20 rolls

Step-by-step explanation:

there is 20 in each roll 410/20 is 20.8.

7 0
3 years ago
Solve the following 3 × 3 system. Enter the coordinates of the solution below.
defon

9514 1404 393

Answer:

  (x, y, z) = (-1, 0, -3)

Step-by-step explanation:

We notice that the coefficients of z are such that elimination of the z term from the equations is made easy.

Adding equations 1 and 2:

  (2x -3y -2z) +(x +3y +2z) = (4) +(-7)

  3x = -3

  x = -1

Adding equations 2 and 3:

  (x +3y +2z) +(-4x -4y -2z) = (-7) +(10)

  -3x -y = 3

Substituting for x, we get ...

  (-3)(-1) -y = 3

 0 = y . . . . . . . . . . . add y-3 to both sides

Then z can be found from any equation. Substituting for x and y in the second equation gives ...

  -1 +2z = -7

  2z = -6 . . . . . add 1

  z = -3 . . . . . .divide by 2

The solution is (x, y, z) = (-1, 0, -3).

3 0
3 years ago
Whats the correct answer??
Tpy6a [65]

use the midpoint formula. It's x1 + x2 / 2, y1+y2/2. When you solve you get (0, 1/2) is the midpoint. Hope this helps


8 0
3 years ago
A salsa recipe uses green pepper, onion, and tomato in the extended ration 1 : 3 : 9. How many cups of onion are needed to make
Elanso [62]
Let x be a variable.

Using the ratio and the given number of 117, we can create the following formula:

1x + 3x + 9x = 117, where 3x is the cups of onion

Simplify this equation.

13x = 117

Divide both sides by 13

x = 9

We want to solve for 3x, so multiply both sides by 3

3x = 27

As I started earlier, 3x is how many cups of onions is needed; thus, 27 is our answer. Hope this helps! :)
7 0
3 years ago
Read 2 more answers
The length of a rectangle is 5 units more than twice its width. Find an expression for the perimeter of the rectangle.
kolezko [41]
The width would be 10
length would be 15
8 0
3 years ago
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