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Elis [28]
3 years ago
14

Solve the system of linear equations using elimination.

Mathematics
2 answers:
GarryVolchara [31]3 years ago
8 0

<u>Answer:</u>

C) (−3, 6)

<u>Step-by-step explanation:</u>

10x + 7y = 12 ___ (−3, 6)

10×(-3) + 7×6 = -30 + 42 = 42 - 30 = 12

8x + 7y = 18 ___ (−3, 6)

8×(-3) + 7×6 = -24 + 42 = 42 - 24 = 18

Lisa [10]3 years ago
3 0

Answer:

C. (-3,6)

Step-by-step explanation:

Take 10x + 7y = 12 as first equation and 8x + 7y = 18 as second equation.

Subtracting both equations, you will get

10x + 7y - 8x - 7y = 12 - 18

2x = -6

x = -3

Substitute value of 'x' in any of the given equation :-

10x + 7y = 12

10 * -3 + 7y = 12

7y = 12 + 30

y = 42/7

y = 6

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Plz help me with this and plz show ur work!?! :)
Rufina [12.5K]

Answer:

Total height lowered = 75m

No of times balloon lowered = 5

Height lowered in each lowering = Total height lowered / No of times balloon lowered

                                                      = 75 / 5

                                                     = 15 m

The number indicated that each time balloon is lowered by 15 m

6 0
3 years ago
What is 4% of 75 please
Paul [167]
4% Of 75 is 3 so yeah the answer to your question is 3
8 0
3 years ago
Read 2 more answers
Need help on this kinda confused
stiv31 [10]

Answer:

angle 1= 76 degrees

angle 2= 61 degrees

Step-by-step explanation:

if you draw a line down the middle of the trapezoid and think of the two halves as parallel lines cut by a transversal, your angle are alternate interior, which makes them equal to each other or congruent. another way to find the measure is by finding the supplement to your angle that are already labeled.

just subtract 76 and 119 from 180 to find the supplements, which are 104 and 61, respectively. now that you have two angles labeled inside the trapezoid, you can use your quadrilateral rules to find the other ones. the rule in this case is "consecutive angles equal 180." so, the angle right below to angle R (119 degrees) is angle 2. using subtraction rule, 180-119= 61.

repeat for angle Q to find the measure of angle 1, 180-104= 76.

8 0
4 years ago
a triangle has angles measuring 45°, 55°, and 80°. it is dilated by a scale factor of 2. what are the angle measures, in order f
EastWind [94]

Answer:

45°, 55°, and 80°

Step-by-step explanation:

Dilations preserve angle measures, regardless of the scale factor. Therefore, the angle measures of the image will be the same of that of the pre-image, so our answer is still 45°, 55°, and 80°. Hope this helps!

4 0
3 years ago
Mrs.Hickmam is making cookies. She uses 2 cups of sugar for every 3 tsp. of baking soda
Paul [167]
For every cup of sugar you use 1 1/2 tsp.
X=12(1.5)
18 tsp
5 0
4 years ago
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