Hi guyss I really need help ASAP it would be wonderful if you left an awnser for all of the boxes in the comments thx

Mathematics

2 answers:

leonid [27]3 years ago

4 0

The answer is below.

Mnenie [13.5K]3 years ago

3 0

Estimated answer is 4000 and actual answer is 3901

Step-by-step explanation:

Step 1: Estimate 47 × 83 by rounding off to the nearest 10.

⇒ 47 ≈ 50 and 83 ≈ 80

⇒ 50 × 80 = 4000

Step 2: Do the actual calculation of 47 × 83

× 83

------------

141

+ 376

------------

3901

------------

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Please help!! ill give brainliest!!! this is worth 30 points!!!!!!!!

Svetlanka [38]

Answer: a. 45 = k

b. d/t = 45

c. d = 45t

<u>Step-by-step explanation:</u>

The constant of proportionality (k) equals y divided by x if it is a direct variation. In the given problem, y is represented by distance (d) and x is represented by time (t).

$a)\quad \dfrac{d}{t}=k\\\\\\.\qquad \dfrac{90}{2}=k\\\\\\.\qquad 45=k\\\\\\b)\quad \dfrac{d}{t}=k\\\\\\.\ \quad \dfrac{d}{t}=45\\\\\\c)\quad \text{multiply both sides by t:}\\.\qquad d=45t$