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3 years ago

A local bakery sells cookies for 5.50 per pound and brownies for 7.50

Mathematics

1 answer:

uysha [10]3 years ago

6 0

Answer:

I may be wrong but i think the answer is D

Step-by-step explanation:

We know that y=10, so if we were to multiply 10 by 7.50, it would be 75, not 63, so A and B wouldn't be correct. and we don't know the value of x, so I think D is the best answer.

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Enter an algebraic expression that represents the sum of fifty-seven and x cubed.

tresset_1 [31]

Jdnsjaiajiajsiiaiaia ajjakskskks

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3 years ago

What is the equation of the parabola in vertex form with vertex (2,-4) and directrix y=-6

Pachacha [2.7K]

Answer:

$y=\dfrac{1}{8}(x-2)^2-4$

Step-by-step explanation:

The directrix y=-6 is parallel to the x axes, so parabola has equation of the form

$(x-x_0)^2=2px(y-y_0),$

where $(x_0,y_0)$ is the vertex of parabola and p is parabola's parameter.

By the definition, $\frac{p}{2}$ is the distance from the vertex to the directrix, so

$\dfrac{p}{2}=2\Rightarrow p=4$

Hence, the equation of parabola is

$(x-2)^2=8(y+4)$

See attached diagram for the graph of parabola and its directrix.

In vertex form this equation is

$y=\dfrac{1}{8}(x-2)^2-4$

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3 years ago

Solve sin2x + 2sinx = 0 for 0 ≤ x < 2π. ...?

IgorC [24]

Sin 2 x + 2 sin x = 0
2 sin x cos x + 2 sin x = 0 / : 2
sin x cos x + sin x = 0
sin x ( cos x + 1 ) = 0
sin x = 0, cos x + 1 = 0, cos x = - 1;
Answer:
x = 0, or x = π

3 0

3 years ago

Help, WIll give 20 points

Kisachek [45]

Answer:

i dont know

Step-by-step explanation:

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3 years ago

A store sells new video games for $55 each. The store also features $12 per used video game. Jacob is buying 3 new video games a

nikitadnepr [17]

Answer:

im pretty sure it would be a.

Step-by-step explanation:

55x3 = 165, and 12x would mean the money times the amount of used he bought. so therefore it is a.

3 0

3 years ago