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Rom4ik [11]
3 years ago
8

Ms.Perkins predicted that 20% of the days in March would have temperatures below freezing. How many days does she predict will j

ave temperatures below freezing?​
Mathematics
1 answer:
lorasvet [3.4K]3 years ago
4 0

Answer:

Roughly 6.2 days will have below freezing according to Ms. Perkins

Step-by-step explanation:

20% of days in march Ms Perkins predicts will be below freezing.

March in the year 2019 has 31 days

20% is the same as .20

.20 * 31 = 6.2

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Find the roots. 2x 2 + 7x - 15 =0
Reika [66]
So you always want to pull out the gcf first but since there isn't one, we can move on.
so we can make an acb chart which is multiplying the a value and the c value and find factors that of that product that will equal the b value.
a value is 2
c value is -15
b value is 7
-30 factors to equal 7 = 10, -3
10 - 3 = 7
so the factors 10 and -3 work. 
so now you make 2 separate parenthesis with one of the factors and one x. and it should be set equal to 0.
(x+10)(x-3) = 0
now solve for x in each separate parenthesis. 
x = -10 
x = 3
those r the roots
hope this helps
4 0
3 years ago
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Answer:       ALL ANSWERS BELOW

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3 0
3 years ago
The cost price of 18 sweaters is Rs425 per sweater and the total gain of the shopkeeper is Rs 6,750 1 find the sale price of eac
Nostrana [21]

Answer:

1. Sales price per sweater= Rs 800

2. percentage = 46.875% = 46.88%

Step-by-step explanation:

Given;

Cost price = Rs425 per sweater

Number of sweaters = 18

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Total cost price = cost price × number of sweaters

Total cost price = 18 × Rs425 = Rs 7,650

Total sales price = total gain + total cost price

Total sales price = Rs 6,750 + Rs 7,650

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Sales price (per sweater) = Rs 14,400/18 = Rs 800 per sweater

Profit percentage = total gain/total sales price × 100%

Profit percentage = Rs 6,750/Rs 14,400 × 100%

Profit percentage = 46.875% = 46.88%

8 0
3 years ago
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Answer:

The expected number of adult workers with a high school diploma is 4.

Step-by-step explanation:

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The expected value of X is then the mean of the binomial distribution with the parameters already mentioned.

This is calculated as:

E(X)=\mu_b=n\cdot p=10\cdot0.4=4

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