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liraira [26]
3 years ago
15

GET BRAINLIEST AND ALL MEH POINTS

Mathematics
2 answers:
OLga [1]3 years ago
7 0

To determine if a sum is reasonable you can round each number to the nearest whole and compare the estimated sum to the actual sum.

11111nata11111 [884]3 years ago
4 0

Answer: Look at the tenths place to round to the nearest whole number.

Compare the estimated sum to the actual sum.

The estimated answer is close to the actual answer.

Step-by-step explanation:

Sample respond :)

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4 boys have a mean height of 162cm.Another boy with a height of 165cm joins them.What is the new mean height?
Marina CMI [18]

Answer: 162.6cm

Step-by-step explanation:

4 boys have a mean height of 162cm. Their total height will be the average multiplied by the number of boys which will be:

= 162 × 4

= 648cm

A new boy with height of 165cm joined. This means that we now have 5 boys and their total height will be:

= 648cm + 165cm

= 813cm

The new mean height will be:

= Total height / Number of boys

= 813 / 5

= 162.6cm

7 0
2 years ago
What is b? 0=-1/5(-1)+b
dybincka [34]

Answer:

b= -1/5

Step-by-step explanation:

Though a variable's sign changes when it is multiplied by -1, its absolute value does not. Therefore, we can eliminate the 1:

1/5+b=0

b+1-1/5=0-1/5

b+0/5= 0 -1/5

b=0 -1/5

and you have b= -1/5 as your answer

4 0
2 years ago
Read 2 more answers
Which polynomial is a perfect square trinomial?
Zigmanuir [339]
A polynomial is a perfect square trinomial if in form

a^2x^2-2ab+b^2

look at each

we can eliminate A and B since we have -b^2 not +b^2

look at the rest

C. 5^2b-3*5*b+3^2
nope

D. 4^2x^2-2*4*3x+3^3
yes

answe is D (factors to (4x-9)^2)

8 0
2 years ago
Jenny has 50 square tile she arranges the tiles into a recatugular array of 4 rows. how may tile will be left over?"
Hatshy [7]
Well if you have four rows, then you could put them in four groups of twelve. 12 times 4 is 48, meaning you would have two left over.
5 0
3 years ago
Read 2 more answers
Find the length of PR¯¯¯¯¯¯¯
Ne4ueva [31]

Answer:

8x+4

Step-by-step explanation:

3x-2+5x+6

3x+5x-2+6

8x+4

4 0
3 years ago
Read 2 more answers
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