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Alona [7]
3 years ago
8

Solve the System using elimination. 5x-2y=15 7x+7y=-28

Mathematics
1 answer:
steposvetlana [31]3 years ago
8 0

Answer:

x=1 y=-5

Step-by-step explanation:

7(5x-2y=15) --->      35x-14y=105

2(7x+7y=-28) -->  + <u>14x+14y=-56</u>

                               49x=49  --->x=1

5(1)-2y=15 ---> 5-2y=15 ---> -2y=10 ---> y=-5

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What is the value of x? tangent lines acellus
liberstina [14]

Answer:

30°

Step-by-step explanation:

the three interior angles of a triangle add up to 180, so 60° + 90°+ 30° just works. Sorry it's such a bad explanation, but the answer works . I have acellus too and I entered the answer before answering your question.

5 0
3 years ago
If a ladder is 5.5 m long and it is placed 3 m from the wall, solve and show the work when you use the Pythagorean Theorem to fi
natali 33 [55]

Answer:

4.609 meters

Step-by-step explanation:

The hypotenuse is the ladder because it is the slanted side. 3m is one of the other side lengths

A^2 + B^2 = C^2

3^2 + B^2 = 5.5^2

9 + B^2 = 30.25

30.25 - 9= B^2

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4.609=B

4 0
3 years ago
Does the relation {(5,-2), (5,-8), (4,-6), (7,-1)} represent a function?
Sergio [31]

Answer:

no, it does not

Step-by-step explanation:

if it was a function, all the x values would've been different, but since 5 is repeated, it is not a function.

5 0
2 years ago
3(x-4) + 2x - y2 for x = 5
Alborosie

Answer:

there is some of it sorry cant realy help

Step-by-step explanation:

3x+2x=5x    5*5=25

6 0
3 years ago
The ratio of the length 2.0 meters to the length 1.2 meters is
photoshop1234 [79]

Answer:

The Ration of length 2.0 meters  to the length 1.2 meters = 5 : 3

Step-by-step explanation:

The given two length are 2.0 m  and 1.2 m

Length L1 = 2.0 m     And

Length L2 = 1.2 m

SO, The ratio of L1 : L2 = \frac{2.0}{1.2}

Or, The ratio of L1 : L2 =  \frac{20}{12}

∴    The ratio of L1 : L2 =  \frac{5}{3}

Hence The ratio of L1 : L2 is 5 : 3    Answer

4 0
3 years ago
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