2 years ago

Solve the following system of equations. What is the y-value of the solution? x + 5y - 10 = 0 x = 4y - 8

Mathematics

1 answer:

olga2289 [7]2 years ago

3 0

I think that the value of y is 2.

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kumpel [21]

Answer:

Step-by-step explanation: also it’s 15

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2 years ago

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Find the estimates of x^2-x-2=3

Julli [10]

Answer:

$x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

Step-by-step explanation:

Given

Quadratic equation is

$x^2-x-2=3\\x^2-x-5=0$

Roots of the quadratic equation $ax^2+bx+c=0$ are

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\$

So, for the given equation roots are

$x=\frac{1\pm\sqrt{(-1)^2-4(1)(-5)}}{2\cdot 1}\\x=\frac{1\pm\sqrt{21}}{2}\\so, x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

5 0

2 years ago

Please help, I’ll mark you as brainliest!!!!

Rainbow [258]

Answer:

80%

Step-by-step explanation:

Percent increase is calculated as

$\frac{increase}{original}$ × 100%

Increase = $27 - $15 = $12 , then

percent increase = $\frac{12}{15}$ × 100% = 0.8 × 100% = 80%

5 0

2 years ago

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What is 3 less than -2

Anastasy [175]

-2 - 3 = -5
The answer is negative 5.

4 0

3 years ago

The ratio 3:8 12:32 omg do not like this comon core math

tensa zangetsu [6.8K]

Both ratios are equal

7 0

2 years ago

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