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3 years ago

Simplify the - 501/2+12.3

Mathematics

1 answer:

SOVA2 [1]3 years ago

4 0

Answer:

$- 50 \frac{1}{2} + 12.3 \\ \\ = \frac{ - 101}{2} + 12.3 \\ \\ = - 38.2 \\ \\ = - 38 \frac{1}{5}$

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the mean height of the 30 children in a room is 76 cm james whose height is 107 cm went into the room what is the new mean of th

Snezhnost [94]

Answer:

The new mean is 77cm

Step-by-step explanation:

If the mean height of the 30 children in a room is 76 cm, then the sum of their ages is

$30 \times 76 = 2280cm$

If James with height 107cm joins them, then the total number of children now becomes 30+1=31 and the total height becomes: 2280cm+107cm=2387cm

The new mean now becomes:

$\bar x = \frac{2387}{31} = 77cm$

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3 years ago

Which equals the product of (x-3)(2x + 1)? 222 – 7x - 3 22 – 5x - 3 3x = 2 6,2

Katena32 [7]

Answer:

Step-by-step explanation:

$2 {x}^{2} - 5x - 3$

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3 years ago

Grandma Margie made 12 blankets for her grandkids. The ratio of striped to non striped blankets were 2:4. How many blankets were

solong [7]

Answer:

Total Ratio = 2+4

Striped blankets = 2/6 × 12

= 4 Striped Blankets

Step-by-step explanation:

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6 0

2 years ago

Read 2 more answers

A bag contains 13 pieces of candy. In how many ways can five pieces be selected?

Whitepunk [10]

Five pieces can be selected in 1287 ways

Step-by-step explanation:

When the selection has to be made without considering the order of selection, combinations are used.

The formula for combination is:

$C(n,r) = \frac{n!}{r!(n-r)!}$

Here

Total candies = n = 13

Candies to be selected = r = 5

Putting the values in the formula

$C(13,5) = \frac{13!}{5!(13-5)!}\\=\frac{13!}{5!8!}\\=1287\ ways$

Five pieces can be selected in 1287 ways

Keywords: Combinations, selection

Learn more about combinations at:

#LearnwithBrainly

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3 years ago

Q2 direct and indirect

alekssr [168]

Answer:

i dont understand sorry

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3 years ago