All categories

2 years ago

Solve the system of linear equations by substitution x=5y+2 and x-4y=5

Mathematics

1 answer:

never [62]2 years ago

6 0

Answer:

(17,3)

Step-by-step explanation:

Equation 1.

x=5y+2

Equation 2.

x-4y=5

To solve with substitution, it looks like the x-variable in the first equation is already isolated. So, plug the first equation into the x-variable in the second equation.

x-4y=5

(5y+2)-4y=5

y+2=5

y=3

Now that we found y, plug y into one of the equations to solve for x.

x=5y+2

x=5(3)+2

x=15+2

x=17

(17,3)

You might be interested in

Now Ann is x years old and her sister is eight years younger than her. After five years , Anne's age is twice the age of her sis

svp [43]

Answer:

You can refer to the given attachment

7 0

2 years ago

I need help with this I don't understand this

Mandarinka [93]

Answer:

45.8

Step-by-step explanation:

We need to find the surface area for this entire figure!

We can see that this is a pyramid here - we must find the area of the 3 triangles and the base triangle at the bottom.

The 3 triangles building up the pyramid are all equal to each other.

To find the area of a triangle, use $Area = base*height/2$

$Area=3(\frac{5*7}{3} )+(\frac{5*4.3}{2})\\Area=35+10.75=45.75$

Round to the nearest tenth: 45.75 -> 45.8

4 0

4 years ago

P l e a s e h e l p p p p !!!

Mandarinka [93]

Answer:

This would be the last option I think, sorry if it's wrong.

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

WILL MARK BRAINLIST the answer is not 21.5

vaieri [72.5K]

Answer: 137... well i think because 180-43= to 137.

8 0

3 years ago

2 1/2 + (-1/3)<br> PLz, help me with this question.

dem82 [27]

Answer:

2 1/6

Step-by-step explanation:

7 0

3 years ago