3 years ago

What is the maximum value of the expression -5x^2 + 100x + 4,000?

Mathematics

1 answer:

Ludmilka [50]3 years ago

3 0

Answer:

4500

Step-by-step explanation:

$x=10$

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50= -2.5x can someone help me solve this? thank you!

Katarina [22]

Answer: x=-20

Step-by-step explanation:

Isolate the variable(x) by dividing each side by factors (50) that do not contain the variable.

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3 years ago

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Lydia graphed ΔXYZ at the coordinates X (0, −4), Y (2, −3), and Z (2, −6). She thinks ΔXYZ is a right triangle. Is Lydia's asser

katrin [286]

Answer:

Option (4)

Step-by-step explanation:

Vertices of the triangle are X(0, -4), Y(2, -3) and Z(2, -6).

Slope of XY ( $m_{1}$ ) = $\frac{y-y'}{x-x'}$

= $\frac{-3+4}{2-0}$

( $m_{1}$ ) = $\frac{1}{2}$

Similarly, slope of XZ ( $m_{2}$ ) = $\frac{-6+4}{2-0}$

( $m_{2}$ ) = (-1)

$m_{1}\times m_{2}=-\frac{1}{2}$

Which should be (-1) if XY and XZ are perpendicular to each other.

Now we can say that XY and XZ are not perpendicular.

Therefore, Lydia's assertion that ΔXYZ is a right triangle is not correct.

Option (4) will be the answer.

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2 years ago

If b = 3, then b^-2 is equivalent to _____.

Andrei [34K]

Yes D is the correct option !

if you want to know how , comment, or you are good to go !

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3 years ago

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Please help: In Δ ABC, sin A=88, sin B=42, and a =17, find the length of b.

iren2701 [21]

Answer:

Step-by-step explanation:

Use the law of sines.

$\frac{sin A}{a} = \frac{sin B}{b} \\$

Plug values in.

$\frac{sin88}{17} = \frac{sin42}{b}\\$

Cross multiply.

$bsin88 = 17sin42\\b = 11.38$

Hope that helps.

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2 years ago

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Which is equivalent to 5+2(3x-4)=12x-11? C. 9x=17 B. 6x=8 D. 9x=-39

Rzqust [24]

5+2(3x-4)=12x-11 is 5+6x -8 = 12x -11, 5-8+11= 12x-6x, “8= 6x” so option B is correct

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2 years ago

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