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Marta_Voda [28]
3 years ago
13

1 point

Mathematics
1 answer:
zlopas [31]3 years ago
4 0

Answer:

14 cupcakes

Step-by-step explanation:

75% is equivalent to 3/4 so 56 divided by 4 times by 3

56 divided by 4 is 14 X 3 = 42

56-42 leaves you with 14 cupcakes

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C= 6x+100 and c=10x+80 <br> what number does x have to be for c to be the same on each equation?
slega [8]

Answer:

x= 5 , for c to be same on each eqn

7 0
2 years ago
What is the equation of the line, in general form, that passes through the point (-1, -1) and is parallel to the line whose equa
Ksenya-84 [330]

Answer:

Step-by-step explanation:

y = -x + 3

y + 1 = -(x + 1)

y + 1 = -x - 1

y = -x - 2

x + y + 2 = 0 is the solution

5 0
3 years ago
Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .
Musya8 [376]

Formula for the perimeter of a quarter circle: C = ((pi x 2r) / 4) + 2r

C = ((3.14 + 12) / 4) + 12

C = 3.785 + 12

C = 15.79 meters

Hope this helps! :)

4 0
3 years ago
Galena is solving the following system. 3x+2y+3z =5 7x+y +7z=-1 4x-4y-z=-3
babymother [125]

Answer:

She did not multiply equation 3 in step 2 by the correct value.

Step-by-step explanation:

Given:

3x+2y+3z=5\\7x+y+7z=-1\\4x-4y-z=-3

In order to solve this, we need to eliminate any one variable and then form a simultaneous equation with the remaining two variables. Then, we nee to solve the simultaneous equation.

Here, Galena is trying to eliminate the variable z first.

Step 1:  She multiplies equation (3) by 3 and adds it to equation (1)

Let us multiply equation (3) by 3

(4x-4y-z=-3)\times 3 = (3\times 4x)-(3\times 4y)-(3\times z)=3\times -3\\(4x-4y-z=-3)\times 3 =12x-12y-3z=-9

Now, adding this to equation 1 will cancel out z terms.

12x-12y-3z+3x+2y+3z=-9+5\\(12x+3x)+(-12y+2y)+(3z-3z)=-4\\15x-10y+0=-4

Now, she need to make one more equation in x\ and \ y.

Step 2: She multiplies equation (3) by -7 and adds it to equation (2)

Multiplying equation (3) by -7 will give,

(4x-4y-z=-3)\times -7 = (-7\times 4x)-(-7\times 4y)-(-7\times z)=-7\times -3\\(4x-4y-z=-3)\times 3 =-28x+28y+7z=21

Now, adding this to equation 2 will not cancel out z terms.

-28x+28y+7z+7x+y+7z=21-1\\(-28x+7x)+(28y+y)+(7z+7z)=20\\-21x+29y+14z=20

So, she makes mistake in step 2 as the z terms are not being cancelled.

6 0
3 years ago
Read 2 more answers
What is the point slope form of f(-3)=16 and m=25, Explain please
Firlakuza [10]

Answer:

y - 16 = 25(x  + 3)

Step-by-step explanation:

The equation of a straight line in point slope form is given by:

y-y_1=m(x-x_1)

We were given that f(-3)=16, this means that the point (-3,16) is a point on this line.

Also the slope of this line is given as m=25.

We substitute the points and the slope to get:

y - 16 = 25(x -  - 3)

This simplifies to:

y -16 = 25(x  + 3)

8 0
3 years ago
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