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3 years ago

Pls help me I don’t get it

Mathematics

2 answers:

topjm [15]3 years ago

7 0

Answer:

A. 30cm, 73.3cm

Step-by-step explanation:

Circumference of a circle = 2πr

60π=2πr

r=60/2=30

Radius is 30cm

Arc length = 2πr(θ/360) = 2π(30)(140/360) = 73.3038285838

Arc length is 73.3cm

Minchanka [31]3 years ago

4 0

Answer: C

Step-by-step explanation: Hope this help :D

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A bricklayer can build a wall of a certain size in 5 hours. Another bricklayer can do the same job in 4 hours. If the bricklayer

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Answer:

Step-by-step explanation:

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3 years ago

What is the reason for each strip on the solution of the equation?

Pani-rosa [81]

Step 1: Given

Step 2: Distributive Property

Step 3: Addition Property of Equality

Step 4: Division Property of Equality

Step-by-step explanation:

We need to match the reason with the correct step in the equation.

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$2x = -4(x-3)$

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Now, Applying addition property of equality:

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$2x+4x=-4x+12+4x\\6x=12$

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So, Answer will be:

Step 1: Given

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7 0

3 years ago

PLZ HELP!!!!

lawyer [7]

Rise over run is 7 over 2 so 7/2 is the slope

4 0

3 years ago

Read 2 more answers

What properties can be used to solve 7y-15=-29. Identity property of multiplication,addition property of equality ,distributive

Sveta_85 [38]

Answer:

Addition Property of Equality.

Inverse property of multiplication.

Step-by-step explanation:

Given the equation:

$7y-15=-29$

First of all, let us use Addition Property of Equality.

According to the property, if we add a number on both sides of an equality, there is no change in the equality.

In other words, the equality will be same if we add the same number on Left Hand Side and Right Hand Side of the equality.

First of all, let us add 15 on both sides of the equality:

$7y-15+15=-29+15\\\Rightarrow 7y=-14$

Now, let us Inverse property of multiplication.

i.e. Multiplication of a number with its inverse is equal to 1.

$a\times \frac{1}{a} = 1$

So, let us multiply the given equation with $\frac{1}7$

$7y \times \dfrac{1}{7}=-14 \times \dfrac{1}{7}\\\Rightarrow 1y =-2\\\Rightarrow y=-2$

The properties used are:

Addition Property of Equality.

Inverse property of multiplication.

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3 years ago

A frequency distribution for the class level of students in an introductory statistics course is shown. Two students are randoml

Andrews [41]

Answer: $\dfrac{21}{410}$ .

Step-by-step explanation:

Formula : Probability = $\dfrac{\text{favorable outcomes}}{\text{Total outcomes}}$

From the given frequency distribution for the class level of students in an introductory statistics course, we have

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Then, the probability that the first student obtained is a junior and the second a senior would be $\dfrac{12}{41}\times\dfrac{7}{40}=\dfrac{21}{410}$

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8 0

3 years ago