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Basile [38]
3 years ago
5

How to solve 3x+y=-14;-2x-y=9

Mathematics
2 answers:
Arada [10]3 years ago
8 0
This is a set of simultaneous equations.
3x+y=-14
-2x-y=9
Use elimination by addition
x=-5
the substitute for y
y=1
RUDIKE [14]3 years ago
5 0
3x+y=-14
-2x-y=9
++++++++++++
x=-5
y=1
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Answer:

The correct answer is "Circle 1 is a translation of 1 unit right and 7 units up from Circle 2, and a dilation of Circle 2 with a scale factor of 1.6"

Step-by-step explanation:

We can tell this because first they identify the movement properly. When going from (-3, 0) to (-2, 7), we move to the right one and up 7.

Also, we know there is a scale factor of 1.6, because when we look at the radius of each circle, we can divide and find that factor.

8x/5x = 1.6

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4 years ago
EXPLAIN HOW TO FACTOR THE FOLLOWING TRINOMIAL. It’s in the picture above, HELP ME PLEASE!!!
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6 0
3 years ago
Chandler, Jamal, Allison, and Qi are given the following problem. In 1982, Wayne Gretsky set a record for the greatest number of
Pavel [41]

Answer:

The correct answer is B.

Step-by-step explanation:

Since Chandler, Jamal, Allison, and Qi are given the following problem: "In 1982, Wayne Gretsky set a record for the greatest number of hockey goals in one season with 92 goals. If a player has scored 60 goals this season and averages 2 goals per game, how many additional games must he play to break the record? ", And each student writes an inequality to represent the situation:

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Jamal wrote 60 + 2g> 92

Allison wrote 60 + 2g <92

Qi wrote 60 + 2g ≤ 92

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6 0
3 years ago
Given two equilateral triangle; the length of the sides of the 2nd triangle are 2 less than 3
goldfiish [28.3K]

9514 1404 393

Answer:

  first triangle -- side: 304.8 mm; perimeter: 914.4 mm

  second triangle -- side: 863.6 mm; perimeter: 2590.8 mm

Step-by-step explanation:

We are given two equilateral triangles. The perimeter of the second is given as 102 inches, so its sides have length 102/3 = 34 inches. This is 2 less than 3 times the side length in the first triangle. So, adding 2 will give 3 times the side length of the first triangle: 36 inches, which also happens to be its perimeter. Those side lengths are 36/3 = 12 inches.

Now, we know:

  first triangle -- side length 12 inches, perimeter 36 inches

  second triangle -- side length 34 inches, perimeter 102 inches.

These measurements are desired in millimeters. Each inch is 25.4 millimeters, so we can find the desired measures by multiplying these numbers by 25.4.

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  34×25.4 = 863.6; 102×25.4 = 2590.8

The desired lengths are ...

  first triangle -- side: 304.8 mm; perimeter: 914.4 mm

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6 0
3 years ago
I took a picture of a math question.
Maurinko [17]
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B) You can divide 5280 by 4 to find the answer of this one.

C) Divide by 4 again (because it is a fourth), but then multiply by three because the question asks for three-fourths.

D) A minute is 60 seconds, so 60 divided by 3 is 20.  Given that it asks for two-thirds, you then multiple 20 by 2 to get the final answer of 40 seconds.

E) There are 24 hours in a day, so divide 24 by 8.

Hopefully this helps "get the ball rolling" for you!

7 0
3 years ago
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