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Ann [662]
3 years ago
5

Delia drives 220 km in 2 hours. Calculate her average speed in km/hrs.

Mathematics
1 answer:
alexira [117]3 years ago
8 0
110 because avg speed is total distance over total time
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I need help solving this problem, please respond as fast as you can.<br><br> -7 – 3x = 1x + 4(2 + x)
Ratling [72]

Answer:

x = -15/8

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

-7 - 3x = 1x + 4(2 + x)

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute 4:                                                                                                    -7 - 3x = x + 8 + 4x
  2. Combine like terms:                                                                                       -7 - 3x = 5x + 8
  3. [Addition Property of Equality] Add 3x on both sides:                                -7 = 8x + 8
  4. [Subtraction Property of Equality] Subtract 8 on both sides:                      -15 = 8x
  5. [Division Property of Equality] Divide 8 on both sides:                               -15/8 = x
  6. Rewrite/Rearrange:                                                                                        x = -15/8
6 0
3 years ago
Simplify -4 1/4 - (9 1/2)
Bogdan [553]
Tbh idk but try using photo math it works
6 0
3 years ago
Read 2 more answers
Knitting a scarf. On average she can knit 2 mm in 35 minutes. Express this as a rate in mm/min​
Natali5045456 [20]

Answer:

she can knit 1mm/17.5min or she can knit 1mm in 17 minutes and 30 seconds.

8 0
3 years ago
PLEASE HELP ASAP!!! i’ll mark brainlest
Romashka [77]

Answer:

A

Step-by-step explanation:

you have to times the number number of discs a box holds by the number of boxes

5 0
3 years ago
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Suppose that six guests check their hats when they arrive at the Cigar Parlor and that these hats are returned randomly when the
marissa [1.9K]

Answer:

0.1667

Step-by-step explanation:

There are 6! ways to arrange the hats. The number of ways for which no guest will receive the proper hat is 5! (since there are 5 wrong hats for the first guest, 4 for the second guest, and so on). The probability that no guest will receive the proper hat is:

P=\frac{5!}{6!}=0.1667

The probability is 0.1667.

4 0
3 years ago
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