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Naddika [18.5K]
3 years ago
15

15 - 21 + (-6) =. .............

Mathematics
2 answers:
Luden [163]3 years ago
6 0

15-21+(-6) = 15-21-6 = 15-27 = -12

Tom [10]3 years ago
3 0

Answer: -12

Step-by-step explanation:

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Please help i really don't understand
Natali5045456 [20]

Answer:

  80 square units

Step-by-step explanation:

The area formula refers to a generic triangle ABC in which side lengths 'a' and 'b' are known and angle C is between those sides.

In the given figure, we have known side lengths of 12 and 14, and the angle between them is 72°.

Putting these numbers into the formula, we find the area to be ...

  A = (1/2)(12)(14)sin(72°) ≈ 79.9 ≈ 80 . . . . square units

The area of the triangle is about 80 square units.

7 0
3 years ago
The Sugar Sweet Company is going to transport its sugar to market. It will cost
Troyanec [42]

Im not going to graph it for you but the equation is

C=7250+250s

4 0
3 years ago
A line passes through the given points. write an equation for the line in point-slope form. then rewrite the equation in slope i
rodikova [14]

#1 first we need to solve for slope which is y2-y1/x2-x1

plug in the coordinates and get 1-6/5-(-2) which makes our slope -5/7

then use the equation for point slope form which is:

y-y1=m(x-x1)

then plug in one of the coordinates, I'll use (-2,6), now we have

y-6=-5/7(x+2)

now to make this slope intercept, we just have to solve

y-6=-5/7x-10/7

y=-5/7x+4 4/7

repeat all these steps for 2 and 3

#2: slope = -13/5

plug it in to point slope and get: y+8=-13/5(x-3)

slope intercept:

y+8= -13/5x + 39/5

y= -13/5x -1/5

#3: slope = 3/4

point slope form: y-2=3/4(x-3)

slope intercept: y-2=3/4x-9/4 --> y=3/4x-1/4

7 0
3 years ago
HELP ASAP!! WILL MARK AS BRAINLIEST IF ANSWERED NOW!!!!
tiny-mole [99]

Answer: She should blend 98 lbs of high-quality beans.

She should blend 72 lbs of cheaper beans

Step-by-step explanation:

Let x represent the number of pounds of high quality beans that she should blend.

Let y represent the number of pounds of cheaper beans that she should blend.

She needs to prepare 170 lbs of blended coffee beans. This means that

x + y = 170

She plans to do this by blending together a high-quality bean costing $4.75 per pound and a cheaper bean at $2.00 per pound. The blend would sell for $3.59 per pound. This means that the total cost of the blend would be 3.59×170 = $610.3. This means that

4.75x + 2y = 610.3 - - - - - - - - - -1

Substituting x = 170 - y into equation 1, it becomes

4.75(170 - y) + 2y = 610.3

807.5 - 4.75y + 2y = 610.3

- 4.75y + 2y = 610.3 - 807.5

- 2.75y = - 197.2

y = - 197.2/-2.75 = 71.9

y = 72 pounds

x = 170 - y = 170 - 71.9

x = 98.1

x = 98 pounds

4 0
3 years ago
The area of a garden is 12.9 square feet. each square foot of the garden needs to have 2.6 pounds of soil. how many pounds of so
ikadub [295]
4.9 is the right answer hope i helped
4 0
4 years ago
Read 2 more answers
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