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zalisa [80]
3 years ago
8

Which statement is true about this quadratic equation?

Mathematics
1 answer:
Masteriza [31]3 years ago
8 0

Answer:

There are two real roots because b²>4ac

in the equation, b²= 9² = 81.

4ac = 4×-4×-12= 72

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A sweater originally priced at $80 was marked down by 25%. What was the sale price of the sweater?
crimeas [40]
The original price of the sweater is $80 which is 100% of the price.
If the price is reduced by 25%, then the new price is 75% of the original price since 100% - 25% = 75%.
Now we need to find 75% of $80.

To find a percent of a number, multiply the percent by the number.
To convert a percent into a decimal, divide the percent by 100 which is the same as moving the decimal point two places to the left.

Here's how to change 75% into a decimal.
75% = 75/100 = 0.75

Here's how you calculate 75% of $80.
75% of $80 =

= 75% * 80

= 0.75 * $80

= $60

Answer: The sale price is $60.
6 0
3 years ago
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Answer:

C

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To find the slope between any two points, we can use the slope formula:

m=\frac{y_2-y_1}{x_2-x_1}

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We have the two points (-3, 3) and (-1, -1).

So, let (-3, 3) be (x₁, y₁) and let (-1, -1) be (x₂, y₂).

Substitute them into the slope formula to get:

m=\frac{-1-3}{-1-(-3)}

Subtract:

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Hence, our slope is -2.

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6 0
2 years ago
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Solve for  v  by simplifying both sides of the equation, then isolating the variable.

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Salsk061 [2.6K]
5 x 40 = 200
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What expression gives the height, h, of the triangle?
vfiekz [6]
ABD its ABD Please please
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3 years ago
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