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defon
3 years ago
12

Draw a model or use numbers to solve the equation 3+x= 11. What is the solution?

Mathematics
1 answer:
Stolb23 [73]3 years ago
3 0

Answer:

The solution of the equation 3 + x = 11 is x = 8.

Step-by-step explanation:

Let 3 + x = 11, we see that number of equation and variables are both the same and can be solved by algebraic means.

1) 3 + x = 11 Given

2) x + 3 = 11 Commutative property

3) x + [3+(-3)] = 11 + (-3) Compatibility with addition/Associative property

4) x = 8 Additive inverse/Modulative property/Definition of substraction/Result

The solution of the equation 3 + x = 11 is x = 8.

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A bicycle that usually sells for $230 is on sale for 25% off. find the sale price.
Vera_Pavlovna [14]

Answer:

$172.50

Step-by-step explanation:

Simply do 230 x 0.75 which is the percent subtracted by 25 that decreases a value and makes it less

8 0
3 years ago
5. Ms. Lee has 220 students in all her classes. If her classes collected 2860 pounds of food, how many meals did each student pr
jarptica [38.1K]

Answer:

Each students provides 13 pounds of meal

Step-by-step explanation:

Total students in Ms. Lee class = 220

Total pounds of food collected = 2,860

how many meals did each student provide?

Meals provided by each student = Total pounds of food collected / total number of students

= 2,860 / 220

= 13 pounds

Each students provides 13 pounds of meal

Note: 1.2 pounds of food equals one meal

1.2 pounds : 1 meal = 13 pounds : x meals

1.2/1 = 13/x

1.2 * x = 1 * 13

1.2x = 13

x = 13 / 1.2

= 10.83 meals

Approximately 11 meals to the nearest number

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1/2.2 = x / 13

1 * 13 = 2.2 * x

13 = 2.2x

x = 13/2.2

= 5.91 kilogram

Approximately x = 6 kilograms

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3 years ago
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3 years ago
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