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3 years ago

Can someone help me please

Mathematics

1 answer:

Effectus [21]3 years ago

6 0

Answer: 9.75 m

Step-by-step explanation:

You would plug in 30 for x and get the answer of 9.75 m

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Piper has a points card for a movie theater. she receives 60 rewards points just for signing up. she earns 13.5 points for each

Arisa [49]

Answer:

Step-by-step explanation:

I first took away 60 from 195, as she already had 60 points. Than we were left with 135 points and since she gets 13.5 points every time she visits, I divided 135 by 13, which gives us 10.

3 0

2 years ago

X^2 + Y^2 +ax + 2y + 3 = 0<br><br> What number is this equation the equation of a circle?

Sav [38]

Answer:

Eq: (x+a/2)²+(y+1)²=(a²-8)/4

Center: O(-a/2, -1)

Radius: r=0.5×sqrt(a²-8)

Mandatory: a>2×sqrt(2)

Step-by-step explanation:

The circle with center in O(xo,yo) and radius r has the equation:

(x-xo)²+(y-yo)²=r²

We have:

x²+y²+ax+2y+3=0

But: x²+ax=x²+2(a/2)x+a²/4-a²/4= (x+a/2)²-a²/4

And

y²+2y+3=y²+2y+1+2=(y+1)²+2

Replacing, we get:

(x+a/2)²-a²/4+(y+1)²+2=0

(x+a/2)²+(y+1)²=a²/4-2=(a²-8)/4

By visual inspection we note that:

- center of circle: O(-a/2, -1)

- radius: r=sqrt((a²-8)/4)=0.5×sqrt(a²-8). This means a²>8 or a>2×sqrt(2)

6 0

3 years ago

1+1

Bezzdna [24]

Answer:

Step-by-step explanation:

Well you should count with fingers, one finger and one finger, two fingers

8 0

3 years ago

Read 2 more answers

I think its identity but I'm not sure

victus00 [196]

Answer: C, you are correct

Step-by-step explanation:

7 0

3 years ago

At the Howelton Hot Dog Happiness competition, Olaf eats five fewer than triple the hot dogs Alfred eats. Olaf eats 67 hot dogs.

viva [34]

Answer:

Alfred ate 24 hot dogs.

Step-by-step explanation:

Let the number of hot dog ate by Olafs be represented by b.

Since Olafs eats five fewer than triple the hot dogs Alfred eats, and Alfred ate a hot dogs. This can be expressed in a mathematical equation as follows;

b = 3a - 5

But Olafs eats 67 hot dogs, so that b = 67. Thus;

b = 3a - 5

67 = 3a - 5

67 + 5 = 3a

3a = 72

divide both sides by 3 to have;

a = $\frac{72}{3}$

a = 24

Alfred ate 24 hot dogs.

7 0

3 years ago