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slavikrds [6]
4 years ago
11

15 out of the 20 students at the lunch table had a sandwich. What percent of the table do those 15 students represent? Put this

in a proportion.
Mathematics
1 answer:
shusha [124]4 years ago
5 0
Hello!! So any time a question says "What percent" you can immediately write down the fraction X/100. The proportion would be 15/20= x/100. Then cross multiply to get the equation 1,500=20x. Divide both sides by 20 and x equals 75! Hope this helps!
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The width of a rectangular garden is 4.5 meters shorter than its length which is x meters.
Contact [7]

Answer:

  A.  width = x - 4.5

  B.  111 = 2(x + (x -4.5))

Step-by-step explanation:

A. The width is 4.5 meters shorter than x, so is x -4.5.

__

B. The perimeter is twice the sum of length and width. It is 111 meters, so an equation for it could be ...

  111 = 2(x + (x -4.5))

4 0
4 years ago
What is the LCM of 4489​
vredina [299]

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67|4489

67|67

⠀ | 1

4 0
3 years ago
Read 2 more answers
Jim needs to rent a car. A rental company charges $21.00 per day to rent a car and $0.10 for every mile driven.
Ulleksa [173]

Answer:

21d+25\leq 115

Max is 4 days.

Step-by-step explanation:

An inequality is a math statement with more the one solution. The solution has a range of values for which the inequality can be satisfied. It has the same following components as an equation: variables and operations. However, the equal sign is replaced by an inequality sign: ,\leq,\geq.

We start by choosing a variable for an unknown value. Here is it the number of days he rents the car. We choose d.

We know he rents it for $21 pr day or 21d for any number of days. We also know her will drive 250 miles at $0.10 per mile or 0.10(250). We will combine the two into an expression.

21d + 0.10(250)

We know his limit is $115. This means he can rent the car for any number of days until he reaches $115. The charge must be less than or equal to 115.

So we write 21d+0.10(250)\leq 115.

To find the number of days he can rent the car, we solve for d using inverse operations.

21d+0.10(250)\leq 115\\21d+25\leq 115\\21d+25-25\leq 115-25\\21d\leq 90\\\frac{21d}{21} \leq \frac{90}{21}\\d\leq 4.3

This means Jim can rent the car up to 4 days. The 5th day will put the cost over $115.

3 0
4 years ago
5×+9y, when x=8 and y =11
natima [27]

Answer:

139

Step-by-step explanation:

(5*8)+(9*11)

  40+99

     139

7 0
4 years ago
John bought a play station game for $54.50. The tax on the game is 5%. What
Leni [432]

Answer:

1089/20 (Decimal: 54.45)

4 0
3 years ago
Read 2 more answers
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