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erma4kov [3.2K]
3 years ago
7

Ruby and her children went into a bakery and she bought $18 worth of donuts and cookies. Each donut costs $1 and each cookie cos

ts $1.50. She bought a total of 15 donuts and cookies altogether. Graphically solve a system of equations in order to determine the number of donuts, x,x, and the number of cookies, y,y, that Ruby bought.
Mathematics
1 answer:
Serjik [45]3 years ago
5 0
IDK IDK IDK IDK IDK IDK IDK IDK IDK IDK
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Find the sum of 10 + 5i and its complex conjugate.<br> Write your answer in the form a + bi
gogolik [260]

Answer:

20.

Given, complex number is 10+5i .

We need to find sum of the given complex number and its conjugate. The conjugate of 10+5i is 10-5i. Therefore, the sum will be 10+5i+10−5i=20.

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3 years ago
If elephant grass grows <br> 2 1/5 inches a day, how many inches will it grow in 6 days?
wel

Answer:

13.2 or 13 1/5 inches

Step-by-step explanation:

2 1/5 in/day * 6 days = 13.2 or 13 1/5 inches

OR

  2 1/5 in

+ 2 1/5 in

+ 2 1/5 in

+ 2 1/5 in

+ 2 1/5 in

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13 1/5 in

6 0
3 years ago
Meredith has 8 pages of homework to do. If she can finish of a page in one hour, how
Damm [24]

Answer: 8 Hours to finish her homework.

Step-by-step explanation: We know each page, or 1 page takes 1 hour to finish. We want to know how many hours it would take to take finish 8 pages of homework. To find this, simply multiply 1 by 8. (1 hour per page, or 1 hour for each of the 8 pages.)

1 x 8 = 8.

So it will take Meredith 8 hours to finish her homework.

4 0
3 years ago
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Find the value of r so the line that passes through the pair of points has the given slope.
SOVA2 [1]

Answer:

The missing value in the ordered pair is 66

Step-by-step explanation:

Given that:

(12,10) and (-2,r)

Slope = m = -4

We have to find the value of r so that the line has a slope of -4.

Slope is the steepness of line which is denoted by m.

Here,

x_1=12, y_1=10\\x_2=-2, y_2=r

Putting the values in slope of line formula,

-4=\frac{r-10}{-2-12}\\ -4=\frac{10-r}{-14}\\

Multiplying both sides by -14

-4*-14=\frac{r-10}{-14}*-14\\56=r-10\\56+10=r\\66=r\\ r=66

The value of r is 66

Hence,

The missing value in the ordered pair is 66

4 0
3 years ago
Find the area of the trapezoid
Alexandra [31]

Answer:

\sf area \  of \ trapezoid \ =375 \ mm^2

Explanation:

\sf area \  of \ trapezoid \ = \dfrac{1}{2} * ( base \  1 + base \ 2 ) * height

using the formula:

\sf area \  of \ trapezoid \ = \dfrac{1}{2} * ( 14+ 36 ) * 15

\sf area \  of \ trapezoid \ = \dfrac{1}{2} * ( 50 ) * 15

\sf area \  of \ trapezoid \ =25 * 15

\sf area \  of \ trapezoid \ =375 \ mm^2

5 0
3 years ago
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