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prohojiy [21]
3 years ago
10

2x+7y=-20, y=3x+7. solve using elimination

Mathematics
1 answer:
Setler79 [48]3 years ago
8 0

Answer:

(x,y) = (-3,-2)

Step-by-step explanation: Please brainliest!

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Very easy! PLEASE HELP I will mark brainliest
Sladkaya [172]

Answer:

B i think let me solve

Step-by-step explanation:

8 0
3 years ago
Find the shortest distance, d, from the point (5, 0, −6) to the plane x + y + z = 6.
DENIUS [597]

Answer:

\frac{7}{\sqrt{3}}

Step-by-step explanation:

The shortest distance d, of a point (a, b, c) from a plane mx + ny + tz = r is given by:

d = |\frac{(ma + nb + tc - r)}{\sqrt{m^2 + n^2 + t^2}} |                   --------------------(i)

From the question,

the point is (5, 0, -6)

the plane is x + y + z = 6

Therefore,

a = 5

b = 0

c = -6

m = 1

n = 1

t = 1

r = 6

Substitute these values into equation (i) as follows;

d = |\frac{((1*5) + (1*0) + (1 * (-6)) - 6)}{\sqrt{1^2 + 1^2 + 1^2}} |

d = |\frac{((5) + (0) + (-6) - 6)}{\sqrt{1 + 1 + 1}} |

d = |\frac{(-7)}{\sqrt{3}} |

d = \frac{7}{\sqrt{3}}

Therefore, the shortest distance from the point to the plane is  d = \frac{7}{\sqrt{3}}

5 0
3 years ago
I need some help with this one I'm lost!
SpyIntel [72]

Answer:

-334

Step-by-step explanation:

tyes sfdfa d

3 0
3 years ago
The total bill for five people was $74.90. They Agreed to leave a 20% tip and divide the total cost evenly. How much did each of
Bingel [31]
TIP:
74.90*.2=14.98 
74.90+14.98=89.88
TOTAL:
89.88/5=17.98

each person pays $17.98

Hope this helps!
3 0
3 years ago
Liang bought a basket of apples to make pies for her friends. The basket of apples weighed ppp pounds. Before she had time to ma
Bess [88]

Answer:

The equation to describe the situation is  p-3=17.

And, the total weight of the basket of apples was <u>20 pounds</u>.

Step-by-step explanation:

<u><em>The question is incomplete so, the complete question is below:</em></u>

Liang bought a basket of apples to make pies for her friends. The basket of apples weighed p pounds. Before she had time to make the pies, she ate 3 pounds of apples. There are 17 pounds of apples left to make pies. Write an equation to describe this situation. What was the total weight of the basket of apples?

Now, to write an equation to describe the situation. And to find the total weight of the basket of apples.

So, the basket of apples total weighed = p\ pounds.

Liang ate apples weighed = 3 pounds.

And the apples left for the pies weighed = 17 pounds.

Now, to write an equation describing the situation:

p-3=17.

<u><em>Thus, the equation is </em></u>p-3=17.<u><em /></u>

Now, to get the total weight of the basket of apples:

p-3=17\\\\Adding\ both\ sides\ by\ 3\ we\ get:\\\\p=20

<u><em>Hence, the basket of apples total weighed = 20 pounds.</em></u>

Therefore, the equation to describe the situation is p-3=17.

And, the total weight of the basket of apples was 20 pounds.

4 0
3 years ago
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