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3 years ago

The following dot plot shows the mass of each rock in Nija's rock collection. Each dot represents a different rock.

Mathematics

2 answers:

Aleksandr [31]3 years ago

6 0

Answer:

To find the total mass you will add the following masses together:

1/4 + 1/4 + 2/4 + 2/4 + 2/4 + 3/4 + 3/4

For every X you list the number that many times.

The sum is 14/4 or 3 2/4 or

3 1/2.

The answer is choice D.

Read more on Brainly.com - brainly.com/question/9499907#readmore

Step-by-step explanation:

aleksandrvk [35]3 years ago

5 0

Answer:

Step-by-step explanation:

35 + 39 + 39 + 43 + 43 + 44 = 243g

<h2><u><em>I know I may not be an expert, and my level is only ambitious, but I had to add this answer because recently, I've seen a lot of, "Ace's" or, "Genius's" getting answers wrong.</em></u></h2>

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Find the angle, correct to two decimal places, that the lines joining the given points make with the positive direction of the x

Anni [7]

The angle the line joining the given points make with the positive direction of the x-axis is 341.56°

The angle Ф between two points (x₁,y₁) and (x₂,y₂) is gotten from tanФ = (y₂ - y₁)/(x₂ - x₁).

Since (x₁, y₁) = (3b, a) and (x₂, y₂) = (3a, b)

Substituting the values of the variables into the equation, we have

tanФ = (y₂ - y₁)/(x₂ - x₁)

tanФ = (b - a)/(3a - 3b)

tanФ = -(a - b)/3(a - b)

tanФ = -1/3

taking inverse tan of both sides, we have

Φ = tan⁻¹(-1/3)

Φ = -tan⁻¹(1/3)

Φ = -18.43°

Converting to a positive angle, we have

Φ = -18.43° + 360°

Φ = 341.56°

So, the angle the line joining the given points make with the positive direction of the x-axis is 341.56°

Learn more about angle between two points here:

brainly.com/question/25731151

6 0

2 years ago

Solve the quadratic equation.<br> (a + 5)2 +36 = 9

Andrej [43]

Answer:

No solution unless you want to solve for an imaginary number which in that case $a=27i-5$

Step-by-step explanation:

$(a+5)^{2} +36=9$

$(a+5)^2=-27$

$a+5=\sqrt{-27}$

Here you can stop and say "no solution" since you cannot square root a negative number, but if you want you can still solve for an imaginary number:

$a+5=\sqrt{-1} \sqrt{27}$

$a+5=27i$

$a=27i-5$

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3 years ago

0.11616.......

Vilka [71]

23/198 that is the simplified version

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3 years ago

No links Lean's mother paid 2.16 for 3 pounds of sugar. How much would 1 pound of sugar cost???

hammer [34]

Answer:

Step-by-step explanation:

2.16/3=72c

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3 years ago

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A ball is thrown upward off of a 100 meter cliff with an initial velocity of

Shtirlitz [24]

108

I'm not positive but i belive this is correct

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3 years ago