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3 years ago

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Mathematics

1 answer:

Goshia [24]3 years ago

6 0

Answer:

Step-by-step explanation:

it is the answer and i beleive

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-8x+y=6 7x-1y=-4 Solve using substitution please

Natasha2012 [34]

-8x + y = 6

in the first equation, isolate y and then it becomes...

y = 6 + 8x

use this to replace the y in the second equation.

7x - 1y = -4

let y = 6 + 8x

7x - (6 + 8x) = -4

7x - 6 - 8x = -4

-x - 6 = -4

x + 6 = 4

x = 4 - 6

x = -2

now use this x = -2 into the equation with y.

y = 6 + 8x

y = 6 + 8(-2)

y = 6 -16

y = -10

Therefore, x = -2 and y = -10

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3 0

4 years ago

Read 2 more answers

Need help on my homework so if somebody could at least help me

Daniel [21]

No, if this were to be the same ratio, there would be 114 gold beads on the second piece of jewelry.

84/14=6
6*19=114

4 0

4 years ago

The eastern continental trail is 15 times longer than the Erie canal way trail. The combined length of the hiking trails is 5,76

Lena [83]

The length of eastern continental trail is 5400 miles and length of erie canal trail is 360 miles.

Step-by-step explanation:

Given,

Combined length of both trails = 5760 miles

Let,

x be the length of eatern continental trail.

y be the length of Erie canal trail.

According to given statement;

x+y=5760 Eqn 1

x = 15y Eqn 2

Putting value of x from Eqn 2 in Eqn 1

$15y+y=5760\\16y=5760$

Dividing both sides by 16

$\frac{16y}{16}=\frac{5760}{16}\\y=360\\$

Putting y=360 in Eqn 2

$x=15(360)\\x=5400$

The length of eastern continental trail is 5400 miles and length of erie canal trail is 360 miles.

Keywords: linear equation, substitution method

Learn more about substitution method at:

#LearnwithBrainly

6 0

3 years ago

A cone is cut by a plane parallel to the stant height of the cone. What is the shape of the cross section that is formed?

Travka [436]

Answer:

a triangle

Step-by-step explanation:

6 0

3 years ago

Given that 3m + 2n = 17, find the value of n when m= 3.

Tanya [424]

Answer:

N= 4

Step-by-step explanation:

3(3)+2n=17

9+2n=17

-9. -9

2n=8

2. 2

N=4

6 0

3 years ago