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2 years ago

Which of the following represents the most accurate estimation of 65+77

Mathematics

1 answer:

abruzzese [7]2 years ago

7 0

150 because 65 rounded to the nerast ten is 70 and and 77 rounded to the nearest ten is 80 and 80+70=150

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Which part of an atom is actively exchanged or shared in a chemical bond? proton neutron electron all of the above

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The answer is the proton

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3 years ago

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A landscaper is planting a row of 10 shrubs along the walkway shown below. There must be one shrub at the very beginning and one

rewona [7]

Answer:

$9d = 36$

Step-by-step explanation:

See attachment for complete question

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From the question, we understand that one shrub must be at both ends.

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2 years ago

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The sum of all three numbers is 12. The sum of twice the first number, 4 times the second number, and 5 times the third number i

DaniilM [7]

Answer:

The numbers are 7, 4 and 1

Step-by-step explanation:

Let the numbers =x, y, z.

The sum of all three numbers is 12, x+y+z=12--------i

The sum of twice the first number, 4 times the second number, and 5 times the third number is 35, 2x+4y+5z=35-------ii

The difference between 8 times the first number and the second number is 52, 8x-y=52---------iii

Now, from (i),z =1-x-y--------iv

substitute (iv) in (ii),

2x+4y+5(12-x-y)=35

2x+4y+60-5x-5y=35

collect like terms

-3x-y=-25

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solving (iii) and (v) simultaneously (add iii and v), we have

11x=77

divide both sides by 11 to obtain x=7

Put x=7 in (v)

3(7)+y=25

21+y=25

implies y=25-21=4

put x=7 and y=4 in (iv)

z=12-7-4=1

Hence, the numbers are 7, 4 and 1.

4 0

2 years ago