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4 years ago

Evaluate the expression when y=-7. y? +4y-1

Mathematics

1 answer:

ehidna [41]4 years ago

7 0

Answer:

On substituting $y = -7 , y^{2} + 4y -1 = 20$

Step-by-step explanation:

The given expression = $y^{2} + 4y -1$

Substitute y = -7 in the above quadratic equation:

$(-7)^{2} + 4(-7) -1$ = (-7)(-7) + (-28) -1

= 49 -28 -1 = 49- 29 = 20

So, on substituting $y = -7, y^{2} + 4y -1 = 20$

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Gnoma [55]

In this case: x 1 = - 10, y 1 = - 2;
x 2 = - 4 , y 2 = - 2
The distance between the points :
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3 years ago

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finlep [7]

Answer:

x = 24

Step-by-step explanation:

a^2 + b^2 = c^2

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square root them

b = 24, or x = 24

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What is the weight of one half of two thirds of a sack of rice? The sack of rice weighs 99 kilograms.

Eddi Din [679]

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