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3 years ago

A student used the equation below to create a table.

Mathematics

2 answers:

jeka57 [31]3 years ago

7 0

Answer:

I think the answer is D (1,-2)

Lyrx [107]3 years ago

3 0

Answer:

the answer is (-2, 1)

Step-by-step explanation:

you'll get this answer by substituting x with -2 and solving the equation : (-3*-2)-5=1

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Which of the rectangles below have an area of 18 cm²?

Elenna [48]

$\textsf{Rectangle A}$

$\implies \mathsf {Area = 3 \times 6 = 18cm^{2}}$

$\implies \bf {Yes}$

$\textsf {Rectangle B}$

$\implies \mathsf {Area = 2 \times 9 = 18cm^{2}}$

$\implies \bf {Yes}$

$\textsf {Rectangle C}$

$\implies \mathsf {Area = 5 \times 4 = 20cm^{2}}$

$\textsf {Rectangle D}$

$\implies \mathsf {Area = 9 \times 2 = 18cm^{2}}$

$\implies \bf {Yes}$

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2 years ago

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Jill had a certain amount of money. she spent 15$ downloading new songs. she has 2/5 of the original amount left. how much money

Lostsunrise [7]

Let's call the original amount of money x.

We know that she has 2/5 of the original amount left, and that this is equal to $15.

Therefore, 2/5(x) = 15, and x = $37.50.

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3 years ago

Keegan is printing and selling his original design on t-shirts. He has concluded that for x shirts, in thousands sold his total

Katarina [22]

Answer:

t-shirts: 2790

profit: $12209

Step-by-step explanation:

Given the function:

p(x) = -x³ + 4x² + x

we want to maximize it.

The following criteria must be satisfied at the maximum:

dp/dx = 0

d²p/dx² < 0

dp/dx = -3x² + 8x + 1 = 0

Using quadratic formula:

$x = \frac{-b \pm \sqrt{b^2 -4(a)(c)}}{2(a)}$

$x = \frac{-8 \pm \sqrt{8^2 -4(-3)(1)}}{2(-3)}$

$x = \frac{-8 \pm 8.72}{-6}$

$x_1 = \frac{-8 + 8.72}{-6}$

$x_1 = -0.12$

$x_2 = \frac{-8 - 8.72}{-6}$

$x_2 = 2.79$

d²p/dx² = -6x + 8

d²p/dx² at x = -0.12: -6(-0.12) + 8 = 8.72 > 0

d²p/dx² at x = 2.79: -6(2.79) + 8 = -8.74 < 0

Then, he should prints 2.79 thousands, that is, 2790 t-shirts to make maximum profits.

Replacing into profit equation:

p(x) = -(2.79)³ + 4(2.79)² + 2.79 = 12.209

that is, $12209

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3 years ago

If the cubic function P(x) includes the points (−1, 0), (−2, 0), (3, 0), and (0, −12) which of the following represents this fun

zhannawk [14.2K]

I think the answer would be <span>2(x + 1)(x + 2)(x - 3).
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3 years ago

What are the the factors of 21x squared cause I can't find it

dem82 [27]

Factor
7
x
7
x
out of
14
x
2
14
x
2
.
7
x
(
2
x
)
−
21
x
7
x
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-
21
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Factor
7
x
7
x
out of
−
21
x
-
21
x
.
7
x
(
2
x
)
+
7
x
(
−
3
)
7
x
2
x
+
7
x
-
3
Factor
7
x
7
x
out of
7
x
(
2
x
)
+
7
x
(
−
3
)
7
x
2
x
+
7
x
-
3
.
7
x
(
2
x
−
3
)

6 0

3 years ago

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