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guajiro [1.7K]
3 years ago
8

Colby and Sarah sold newspapers this past summer. Colby earned $4.50 for each newspaper he sold. Sarah's earnings were $35 less

than Colby's at the end of the summer. The following expression shows Sarah's earnings: 4.50y − 35 In the expression, what does the variable y represent?
Mathematics
2 answers:
vladimir2022 [97]3 years ago
7 0
How many newspapers were sold
dybincka [34]3 years ago
7 0

Answer: d. The number of newspapers that Colby sold


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3 years ago
Given that a*b = 2ab - 3b. Determine 2*(3*5)​
Oksanka [162]

Answer:

15

Problem:

Given that a*b = 2ab - 3b. Determine 2*(3*5)​

Step-by-step explanation:

First we find 3*5 using rule a*b = 2ab - 3b.

3*5=2(3)(5)-3(5)

3*5=30-15

3*5=15

Now we are left with 2*15 in which we will still use the rule a*b=2ab-3b.

2*15=2(2)(15)-3(15)

2*15=60-45

2*15=15

Therefore, 2*(3*5)=15.

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3 years ago
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Black_prince [1.1K]

Answer:

$5.40

Step-by-step explanation:

The word <em>percent</em> literally means "for each 100," and we can use this vocab fact to help us answer a question like "what is 1.8 <em>percent </em>of $300?" We have 1.8 <em>for each 100</em> in 300, and since there are 3 hundreds in 300, that means we're going to be counting 3 1.8s, which gets us 1.8 × 3 = 5.4. Since our unit is <em>dollars</em> this comes out to $5.40.

8 0
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kari74 [83]

S= (pi times r times l) + (pi times radius squared)

Factor out the pi times r

S= (pi times r) l + r

Divide

S/(pi times r)= l + r

Find common denominator and subtract

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The answer therefore is A

4 0
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Read 2 more answers
Use the rectangle hexagon with side length 10 meters to fill in the missing information
Vlada [557]

Answer:

A_h=150\sqrt{3}\ m^2

Step-by-step explanation:

<u>Regular Hexagon</u>

For the explanation of the answer, please refer to the image below. Let's analyze the triangle shown inside of the hexagon. It's a right triangle with sides x,y, and z.

We know that x is half the length of the side length of the hexagon. Thus

x=5 m

Note that this triangle repeats itself 12 times into the shape of the hexagon. The internal angle of the triangle is one-twelfth of the complete rotation angle, i.e.

\theta=360/12=30^o

Now we have \theta, the height of the triangle y is easily found by

\displaystyle tan30^o=\frac{x}{y}

Solving for y

\displaystyle y=\frac{x}{tan30^o}=\frac{5}{ \frac{1} {\sqrt{3} }}=5\sqrt{3}

The value of z can be found by using

\displaystyle sin30^o=\frac{x}{z}

\displaystyle z=\frac{x}{sin30^o}=\frac{5}{\frac{1}{2}}=10

The area of the triangle is

\displaystyle A_t=\frac{xy}{2}=\frac{5\cdot 5\sqrt{3}}{2}=\frac{25\sqrt{3}}{2}

The area of the hexagon is 12 times the area of the triangle, thus

\displaystyle A_h=12\cdot A_t=12\cdot \frac{25\sqrt{3}}{2}=150\sqrt{3}

\boxed{A_h=150\sqrt{3}\ m^2}

6 0
3 years ago
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