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4 years ago

Lin has 4 pinecones and some acorns.

Mathematics

1 answer:

frozen [14]4 years ago

8 0

Answer:

Lin has 11 acorns ⇒ answer D

He subtract 4 from 7 instead of add 4 to 7

Step-by-step explanation:

- Lin has 4 pinecones and some acorns

- She has 7 fewer pinecones than acorns

- The meaning of 7 fewer pinecones than acorns is the number of the

pinecones is less than the number of acorns by 7

∵ She has 4 pinecones

∵ She has 7 fewer pinecones than acorns

- The number of pine cones is less than the number of acorns by 7

∴ 4 = number of acorns - 7

- Add 7 to both sides

∴ 11 = number of acorns

*<em> Lin has 11 acorns</em>

- Tom choose answer A which is 3

- He made a mistake in the equation

- He put ⇒ number of the acorns = 7 - 4 not 7 + 4

∴ number of acorns = 3

* <em>He subtract 4 from 7 instead of add 4 to 7</em>

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A father is 3 times as old as his son and his daughter is 3 years younger than the son. Fi the sum of there ages 3 years ago was

inn [45]

Answer:the present age of the father is 45 years

Step-by-step explanation:

Let x represent the present age of the father.

Let y represent the present age of the son.

Let z represent the age of the daughter.

A father is 3 times as old as his son. This means that

x = 3y

his daughter is 3 years younger than the son. It means that

z = y - 3

The sum of their ages 3 years ago was 63. This means that

x - 3 + y - 3 + z - 3 = 63

x + y + z - 9 = 63 - - - - - - - - - - 1

Substituting x = 3y and z = y - 3 into equation 1, it becomes

3y + y + y - 3 - 9 = 63

5y - 12 = 63

5y = 63 + 12 = 75

y = 75/5 = 15

x = 3y = 3 × 15

x = 45

z = y - 3 = 15 - 3

z = 12

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3 years ago

What is -3/4, -3, 0.75, -1.8, -3.5 ordered greatest to least

Mama L [17]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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