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miskamm [114]
3 years ago
5

100 POINTS!!!! PLEASE HELP ASAP!!! EXPLANATION WOULD BE GREATLY APPRECIATED!

Mathematics
1 answer:
Dmitrij [34]3 years ago
5 0

Answer:

1) B- Substitution

2) C- Elimination

3) A- Graphing

Step-by-step explanation:

1)

x+3y=7

5x+11y=3

x = 7 - 3y

Plug this x into the second equation and solve for y first

2)

5x-3y=3 --> (1)

2x+7y=6 --> (2)

Since making any variable the subject would involve fractions, it's better to go for elimination

7(1) + 3(2)

would eliminate y

3)

While comparing cost and adjusting choices, a graph is a better approach because all the possibilities are right in front

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PLEASE HELP!!
inn [45]
You can use the Pythagorean Theorem to find the length of the third side AB (Identified as "x" in the figure attached in the problem), which says that in a right angled triangle, the square of the hypotenuse is equal to the sum of the squares of the legs:
a² = b²+c²
As we can see the figure, the triangle does not have an angle of 90°, but it can be divided into two equal parts, leaving two triangles with a right angle. We already have the values of the hypotenuse and a leg in triangle "A" , so we can find the value of the other leg:
b = √(a²-c²) b = √(10²-4²) b = 9.16
With these values, we can find the hypotenuse in the triangle "B": x = √b²+c² x = √(9.16)²+(4)² x = 10
4 0
3 years ago
An adult African elephant eats about 0.25 ton of food per day. If the zoo orders 2.3 tons of food for the elephant, how many ful
sineoko [7]

Answer:

9 days.

Step-by-step explanation:

8 0
3 years ago
2/8 = ?/32 Find the missing numbers that make the fractions equivalent
horrorfan [7]
The answer is 8/32 because 8 x 4 = 32
3 0
4 years ago
Read 2 more answers
1. A teenager rides his bike a distance of 54 miles in 6 hours.
pentagon [3]
9 miles!
54 divided by 6 is 9.
3 0
2 years ago
Read 2 more answers
Find the solution to the system of equations
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Answer:

(-1, 1)

Step-by-step explanation:

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