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Ber [7]
2 years ago
13

Kim had 12 cookies that brought to school she gave some cookies to her friends if Kim has no more than five cookies left how man

y cookies did she give to her friends
Mathematics
1 answer:
nalin [4]2 years ago
7 0

Answer:

7

Step-by-step explanation:

12-5 = 7

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A migrating bird flies 390 miles in 15 hours. How many miles does it fly in 4 ​hours?
viva [34]

Answer:

104

Step-by-step explanation:

390/15=26

26 times 4 is 104

6 0
3 years ago
how do I solve this quadratic simultaneous equation 2y+2x=7 and x^2-4y^2=8 it has two sets of solutions and I'm solving by both
Ghella [55]
These are all the possible answers i know from experience.

2x + 2y = 7
x^2 - 4y^2 = 8

2x = -2y + 7
x = -y + 7/2

(-y + 7/2)^2 - 4y^2 = 8

y^2 - 7y + 49/4 - 4y^2 = 8

0 = 3y^2 + 7y + 8 - 49/4

0 = 12y^2 + 28y + 32 - 49

0 = 12y^2 + 28y - 17

y = (-b ± √(b^2 - 4ac))/(2a)

y = (-28 ± √(28^2 - 4(12)(-17)))/(2(12))

Dividing by 2 is like dividing by √(4):

y = (-14 ± √(7*28 + (12)(17)))/(2*6)

y = (-7 ± √(7*7 + (3)(17)))/6

y = (-7 ± 10)/6 = 1/2 or -17/6

x = -y + 7/2 = 3 or 19/3

<span>Solutions are (3,1/2) and (19/3,-17/6)</span>
3 0
3 years ago
Read 2 more answers
For every 10 yards on a football field, there is a boldly marked line labeled with the amount of yards. Each of those lines is p
EleoNora [17]

Answer;

D. The sidelines are parallel because they are perpendicular to the same line

Explanation;

According to the perpendicular Transversal Theorem , In a plane, if a line is perpendicular to one of two parallel lines , then it is perpendicular to the other line also. Additionally, the converse perpendicular transversal theorem states that, in a plane, if two lines are perpendicular to the same line, then they are parallel. Thus, the sidelines are parallel and also perpendicular to the same line.

4 0
3 years ago
Read 2 more answers
If m angle acd = 120- x, m angle b = 60, and m angle a = 10 + x, find m angle acb
lesya [120]

Answer:

ACB = 85

Step-by-step explanation:

First find x:

10+ x + 60 = 120 - x

x + 70 = 120 - x

Add x to both sides

2x + 70 = 120

subtract 70 from 120

2x = 50

Divide 2 from both sides

x = 25

10 + 25 + 60 = 95

Subtract 95 from 180

ACD = 85

5 0
3 years ago
Read 2 more answers
Order the following rational numbers<br>from greatest to least. <br>7.5, -6, 7/8, -8/7​
lukranit [14]

Answer:

-6, -8/7, 7/8, 7.5

Step-by-step explanation:

.................

8 0
3 years ago
Read 2 more answers
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