MATHEMATICS HIGH SCHOOL

A worker can do a job in 5 hours, and his student can do the same job in 8 hours. What part of the work is left to finish after two hours of their working together?

Answers

Answer 1
Answer:

Answer:

7/20

Step-by-step explanation:
Answer 2
Answer:

Answer: 13/20

Think: How much can each of them do In 1 Hour (1/5 and 1/8) Then add those two together. Then multiply the sum by two. Finally Simplify the answer of 26/40 into 13/20

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F (a)=2a^2-16a+32
For which 'a' is this equation 0?

Answers

if xy=0 assume that at leas 1 is zero
set it to zero

0=2a^2-16a+32
undistribute 2
0=2(a^2-8a+16)
2*0=0 so assume
a^2-8a+16=0
factor
(a-4)(a-4)=0
set to zero
a-4=0
a=4


when a=4, equation equals zero

Simplify the expression. 7(3x + 5y) + 4y

Answers

=21x + 35y + 4y
= 21x + 39y

Suggest the best imperial unit to measure: 1. The distance from London to New York
2. The amount of water in a jug
3. The weight of a pencil
4. The height of a man

Answers

1.miles
2.slug
3.ounces
4.foot or inches

How do you write 245%as a fraction, mixed number, or whole number in simplest form?

Answers

245 over 100 as a fraction

2 with   45 over 100 as a mixed number

2 with   9 over 20 as a mixed number simplest form

49 over 20 as a non mixed fraction in simplest form (improper fraction)

Factor the perfect square trinomials

24. 9x^2 + 42x + 49

Answers

Answer:

(3x+7)^2

Step-by-step explanation:

Select all of the sentences that are punctuated correctly.The dogs's bowl was empty.
The dog's bowl was empty.
The singers's songs were finished.
The singers' songs were finished.

Answers

Answer:

The dogs's bowl was empty. This is wrong as there dogs's is not the way to write.

The dog's bowl was empty. This is the correct form where dog's is written properly.

The singers's songs were finished. This is wrong as singers's is not the way to write.

The singers' songs were finished. This is also correct as singer's is written properly.


The dog's bowl was empty.

The singer's songs were finished.
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