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2 years ago

Helppppppppppppppppppppppppppppppppppppppp

Mathematics

2 answers:

Alexus [3.1K]2 years ago

5 0

Answer:A

Step-by-step explanation: The dotted line on the bottom is y> -3, the diagonal line is y<= -x.

babunello [35]2 years ago

4 0

The answer is A just took it

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-16.8 / 14 = - 1.2 per day

Step-by-step explanation:

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2 years ago

Elena walked 12 miles. Then she walked 0.25 that distance. How far did she walk all together? Select all that apply. A: 12+0.25∙

vovangra [49]

Answer:

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3 years ago

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3 years ago

What is an equation of the parabola with vertex at the origin and focus (0, 0.75)?

morpeh [17]

Answer:

$x^{2} =3y$

Step-by-step explanation:

Notice that the focus is a points on the vertical axis, that means the parabolla opens vertically, and has the form

$x^{2} =4py$

Because the parameter $p$ is positive and equal to 0.75. Additionally, the vertex is at the origin, that's why the equation is this simple.

Replacing the parameter value, we have

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3 years ago

Okay I know I suck at math and I really don't understand math that well so can you help me on this??? Thank you!

Alja [10]

W - width
l - length
p - perimeter

The perimeter is 72 cm (p=72).
The length is twice the width (l=2w).
The formula for perimeter is 2w+2l=P.

$p=72 \\
l=2w \\ \\
2w+2l=p \\
2w+2 \cdot 2w=72 \\
2w+4w=72 \\
6w=72 \\
w=12 \\ \\
l=2w=2 \cdot 12 =24$

Check the answer:
$2 \cdot 12 + 2 \cdot 24 \stackrel{?}{=} 72 \\
24+48 \stackrel{?}{=} 72 \\
72 \stackrel{?}{=} 72 \\ \hbox{true}$

The length of the photo is 24 cm, the width of the photo is 12 cm.

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3 years ago