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3 years ago

What is the solution 4x-7y=13 2x-7y=3

Mathematics

2 answers:

Alex73 [517]3 years ago

5 0

Add the common like terms to get 6x -14y = 16 hope this helped

agasfer [191]3 years ago

4 0

Solve by Substitution, Addition, or Elimination?

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Camila has up to $100 to spend on her birthday party at a city swimming pool.

Taya2010 [7]

15x+$38.50=$100
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x= $12.30 if you need that too

7 0

2 years ago

The length of one leg of a right triangle is 7 cm more than that of the other leg. The length of the hypotenuse is 3 cm more tha

Lady bird [3.3K]

Answer:

The lengths are 5, 12, and 13.

Step-by-step explanation:

Let x represent the shorter leg of the triangle. Since the other leg is 7 cm more, the longer leg is x+7. Since the length of the hypotenuse is 3 cm more than double that of the shorter leg, the hypotenuse is 2x+3.

The Pythagorean Theorem may be used to find the lengths.

$a^{2}$ + $b^{2}$ = $c^{2}$ a, b are the short and long lengths and c is the hypotenuse

→ $x^{2} + (x+7)^{2} = (2x+3)^{2}$

→ $x^{2} + x^{2} + 14x + 49 = 4x^{2} + 12x + 9$

→ $2x^{2} + 14x + 49 = 4x^{2} + 12x + 9$

→ $2x^{2} - 2x - 40 = 0$

→ $x^{2} - x - 20 = 0$

→ $(x-5)(x+4) = 0$

→ $x = 5$ (The length cannot be negative)

The shorter leg, x, is 5 cm. Since the longer leg is x+7, it is 12 cm. Since the length of the hypotenuse is 2x+3, the hypotenuse is 13 cm.

6 0

3 years ago

Can anyone help me on #3?? And explain?

Alekssandra [29.7K]

Since we know the polygons are similar, the side length ratio of each side must be equal.
13/5 = x/10
Multiply both sides by 10
x = 26
That's your answer. Have a nice day! :)

7 0

4 years ago

I need help with these! Please

Digiron [165]

B is the answer. To that question your welcome

3 0

3 years ago

Eric bought a rectangular piece of cardboard with area 150 square inches to prepare a chart. Later, Eric’s teacher suggested tha

telo118 [61]

Answer:

C. 600

Step-by-step explanation:

Prime Example[s]:

2[1]2[150] → [2][300] >> 600

2[5]2[30] → [10][60] >> 600

I am joyous to assist you anytime.

3 0

3 years ago