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liubo4ka [24]
3 years ago
14

May anyone HELP ME please

Mathematics
1 answer:
Vladimir79 [104]3 years ago
5 0
1a. 64*10^6 +5.4*10^6 = 69.4*10^6 = 6.94*10^7 . . . . square miles

1b. 6.4*10^7 +0.54*10^7 = 6.94*10^7 . . . . square miles
.. yes, we can find the same answer this way

2. The ratio of areas is 6.4*10^7/(5.4*10^6) ≈ 11.85
The Pacific Ocean is about 12 times the size of the Arctic Ocean.

The difference of areas is 6.4*10^7 -0.54*10^7 = 5.86*10^7
The Pacific Ocean is 5.86*10^7 square miles larger than the Arctic Ocean.
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Write the equation for a parabola whose vertex is (-6,-1) and passes through (-12,17).
Hitman42 [59]

Answer:

y=\frac{1}{2}(x+6)^2-1

Step-by-step explanation:

<u>Equation of the Quadratic Function</u>

The vertex form of the quadratic function has the following equation:

y=a(x-h)^2+k

Where (h, k) is the vertex of the parabola that graphically represents the function, and a is a coefficient different from zero.

The vertex of the required equation is located at (-6,-1)

The parabola passes through (-12,17)

Substituting the coordinates of the vertex, the equation of the function is:

y=a(x+6)^2-1

The value of a will be determined by using the given point:

17=a(-12+6)^2-1

Operating:

17=a(36)-1

36a=18\Rightarrow a=18/36=1/2

Solving:

a=1/2

The equation of the parabola is:

\boxed{y=\frac{1}{2}(x+6)^2-1}

7 0
3 years ago
Help please and thanks
kotykmax [81]
Last one is correct
5 0
3 years ago
What is the value of a in the equation 304 b =54, when b =9? O 15 O 18 0 21 O 27
Serhud [2]

Step-by-step explanation:

I'm not sure where a is supposed to be in this equation, but I'm going to assume it's supposed to be written as either 3a x 4b = 54, or 304b = 54a. If it's something else, let me know, but I'll just answer these two for now.

1. 3a x 4b

So we know that b is equal to 9. Therefore, we can rewrite

3a \times 4b = 54

as

3a \times 4(9) = 54

To get rid of a multiplier on one side, divide both sides by the number you want gone. I'll use 4(9), which equals 36.

3a = 54 \div 36 = 1.5

Then we can divide by 3 to get

a = 1.5 \div 3 = 0.5

0.5 isn't a viable answer, so I'll try the second interpretation.

2. 304b = 54a

This one is a bit easier. All we need to do is divide both sides by 54 to get

304b \div 54 = a

304 x 9 = 2736

2736/54 = 50.66...

Again, not a viable answer. Please edit your question to include a and I'll give it another shot!

5 0
2 years ago
Andrew sold 60 baseball cards to a friend . This was 80% of Andrews total baseball card collection. How many total baseball card
svetlana [45]

Answer:

75

Step-by-step explanation:

We know that 80% of Andrew's (former) baseball card collection is 60. Thus, We divide 60 by 80% (equal to 0.8) to obtain \frac{60}{0.8}=75.

7 0
3 years ago
Read 2 more answers
Which equation represents a line that passes through (–2, 4) and has a slope of ?
dimulka [17.4K]

Answer: the answer is y - 4 = (x + 2)


Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
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