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)

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Anthony is 154 cm tall, his brother Gerry is 5/7 as tall as him. How tall is Gerry?

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The correct answer is 110 cm

Explanation:

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$\frac{5}{7}$ - 5 is the numerator and 7 is the denominator