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Olegator [25]
3 years ago
5

A bakery sold 115 cupcakes in one day. The head baker predicted he would sell 95 cupcakes that day. What was the percent error o

f the baker's prediction?
Mathematics
1 answer:
Brut [27]3 years ago
5 0
It was about 17.4% 
======================================================================

% error=
actual value-estimated value 
Then divide that by actual value
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Do all direct proportional graphs need to start from the origin?
Dmitriy789 [7]

Answer:

Direct proportional graphs <u>do not</u> need to start from the origin.

Step-by-step explanation:

Direct proportional graphs do not need to start from the origin. However, <u><em>all </em></u>direct proportional graphs <u>must</u><u> </u><u>go through</u> the origin.

Regardless of the value of the <u>constant of proportionality</u>, <em>k</em>, the graph of the lines all go through the point of origin, (0, 0).  

As a proof, the attached screenshot shows the graph of three equations of direct variations.  The graphed direct variation equations, y = 2x, y = -2x, and y = ¼x all <u>go through the point of origin.</u>

8 0
3 years ago
write an algebraic expression that can be used to find the area of a triangle that has a base of 5 units and a height of x units
Musya8 [376]
V=1/3 x 3.14 x r^2 x H 
v=1/3 x 3.14 x 2.5^2 x H
v=1/3 x 3.14 x 6.25 x H
v=1/3 x 19.625 x H
1 x 19.625= 19.625   x   58.875  divide 58.875 by 3 = 19.625
                            1                3     
19.625 = Height
8 0
4 years ago
Please Help<br> Question; What is the value of x?
Maksim231197 [3]

Answer:

x+5/30 = 16/20

20x+100=480

20x=380

x=19

Step-by-step explanation:

x+5/30 = 16/20

20x+100=480

20x=380

x=19

6 0
3 years ago
One number is 6 more than anouther number. the sum of their squares is 90
Flura [38]
Let x = greater number
      y = smaller  number

(1) x = y + 6&#10;
(1) y = x-6

(2) x^{2} + y^{2} = 90
We'll substitute y in (1) to (2)
(2) x^{2} +  (x-6)^{2} = 90
     x^{2} +  (x^{2} - 12x + 36) = 90
     x^2 + x^2 -12x + 36 - 90 = 0
     2x^2 - 12x -54 = 0&#10;
     2(x^2 - 6x - 27) = 0
     2(x - 9)(x + 3) = 0
 x - 9 = 0        or      x + 3 = 0
      x = 9                        x = -3
and
 y = x - 6                  y = x - 6
 y = 9 - 6                  y = -3 - 6
 y = 3                        y = -9

Therefore, the two numbers can be 9 and 3 or -3 and -9.

      
6 0
4 years ago
15 points, please help me out
Harrizon [31]

Answer 3,5,7

Step-by-step explanation:

8 0
3 years ago
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