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ad-work [718]
3 years ago
6

PLEASE HELP ME!

Mathematics
1 answer:
Ilya [14]3 years ago
5 0

Answer:

(a) 8.3 x 4.9  = 40

(b) 12.1 x 2.95   = 36

(c) 60.94 ÷ 5.7  = 10

(d) 32.79 ÷ 3.1  = 11

Step-by-step explanation:

Here, the given expressions are:

<u>(a) 8.3 x 4.9 </u>

Now, here 8.3 can be  approximated as 8

4.9 can be approximated as  5.0

So,  8.3 x 4.9  ≈ 8 x 5  = 40

Hence, the suitable estimated product for   8.3 x 4.9  = 40

<u>(b) 12.1 x 2.95 </u>

Now, here 12.1 can be  approximated as 12.

2.95 can be approximated as  3.0

So,  12.1 x 2.95   ≈ 12 x 3   = 36

Hence, the suitable estimated product for   12.1 x 2.95   = 36

<u>(c) 60.94 ÷ 5.7  </u>

Now, here 60.94 can be  approximated as 61.

5.7 can be approximated as  6

So, 60.94 ÷ 5.7   ≈ 61  ÷   6   = 10 . 16

Hence, the suitable estimated quotient for  60.94 ÷ 5.7  = 10

<u>(d) 32.79 ÷ 3.1 </u>

Now, here 32.79 can be  approximated as 33.

3.1 can be approximated as 3.

So, 32.79 ÷ 3.1   ≈ 33  ÷ 3   = 11

Hence, the suitable estimated quotient for   32.79 ÷ 3.1  = 11

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Serhud [2]

Answer:

  16

Step-by-step explanation:

Let "a" represent the measure of the angle. Then ...

  5a -30 = 2a +18

  3a = 48 . . . . . . . add 30-2a

  a = 16 . . . . . . . . . divide by 3

An angel is beyond measure, but this angle has measure 16.

4 0
3 years ago
Is 48, 45, 41, 38, 34,... an arthmetic sequence
Evgesh-ka [11]

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No

Step-by-step explanation:

The change in the sequence is not consistent therefore it cannot be an arithmetic sequence.

5 0
2 years ago
What is the gcf of 20 and 8
zaharov [31]
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8 0
3 years ago
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What is the method called on #3
Alexeev081 [22]

Answer:

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Step-by-step explanation:

i hope this helps :)

6 0
3 years ago
Investigate the existence of a extrema value, what does the markered part mean?
OLga [1]

Answer: We have

f'(x) = a x + b,

f'(x) = 0 at x = -b/a

f(x) = a x^2 / 2 + b x + c


Meaning of marked part


❟ ∵ a<0 ❟ f is a quadratic function

∴ f has absolute maximum value at x = -b/a


For all a with a less than zero, f is a quadratic function. Therefore f has a global maximum at x = -b/a


That typesetting seems very sloppy. It probably is supposed to be


∀a < 0, f is a quadratic function.


The second sentence is sloppy in use of "absolute". It can't mean absolute value, so presumably it means "global".


Sometimes a minimum or maximum is only local, but a quadratic function has exactly one extrema, and it is global. And if a < 0, the extrema is a global maximum.


Step-by-step explanation:


An extrema (minimum or maximum) for f(x) occurs only where f'(x) = 0, that is, when the slope of the tangent at x is zero.


But if the function crosses its tangent at that point, the point is an inflection point, not an extrema. A quadratic never crosses it's tangent.


5 0
3 years ago
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