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3 years ago

Please help and explain this

Mathematics

2 answers:

hoa [83]3 years ago

4 0

So, for number one, 25% is easy, because it's 1/4, so 46/4=11.5$
then, number two, 15 percent, you can break it into 10, and 5, so $35.45/.1=3.545, and then five percent of that is 1.7725, then 3.545+1.7725=7.09, so that's your answer for number two. Then tree, is 40% of 174. of means multiply, so change 40% into a fraction, and times it by 174$, so the answer is= 40/100=4/10=2/5*174=69.6$
Do you get it now, or do you need help with the other ones

IRINA_888 [86]3 years ago

3 0

Multiply each price by the discount into a decimal (move the decimal place over 2 on the percents) then subtract that from the regular price and that's sale price

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he XO Group Inc. conducted a survey of brides and grooms married in the United States and found that the average cost of a weddi

ahrayia [7]

Answer:

A. P(X<20,000) = 0.0392

B. P(20,000 < x < 30,000) = 0.488

C. Amount = $39,070

Step-by-step explanation:

From XO group website

Cost of a wedding = $29,858

Mean, μ = $29,858

Standard Deviation, σ =$5,600

a. Calculating the probability that a wedding costs less than $20,000

P(X<20,000)?

First, the z value needs to be calculated.

z = (x - μ)/σ

x = 20,000

z = (20,000 - 29,858)/5600

z = -1.76

So, P(X<20,000) = P(Z<-1.76)

From the z table,

P(Z<-1.76) = 0.0392

P(X<20,000) = 0.0392

b. Calculating the probability that a wedding costs between $20,000 and $30,000

P(20,000 < x < 30,000)

First, the z value needs to be calculated.

z = (x - μ)/σ

When x = 20,000

z = (20,000 - 29,858)/5600

z = -1.76

When x = 30,000

z = (30,000 - 29,858)/5600

z = 0.02

P(20,000 < x < 30,000) = P(-1.76 < z <0.02) --- using the z table

P(-1.76 < z <0.02) = 0.508 - 0.0392

P(-1.76 < z <0.02) = 0.4688

P(20,000 < x < 30,000) = 0.488

c. Using the following formula, we'll get the amount it'll a wedding to be among the 5% most expensive

z = (x - μ)/σ where x = amount

Make x the subject of formula

x = σz + μ

Fist we need to get the z value of 5%

z0.05 = 1.645

x = σz + μ becomes

x = 5600 * 1.645 + 29,858

x = $39,070

Amount = $39,070

5 0

3 years ago

if x represents the first of three consecutive even integers,express the sum of the three integers in terms of x.write the algeb

jek_recluse [69]

Idk this one this sem a littly to hard

5 0

3 years ago

Please help me :((( it’s geometry

NikAS [45]

$\tt Step-by-step~explanation:$

$\tt Area:$

To solve for the area of a triangle, we multiply the length and height, then divide that by two. L = 10. H = 7.

$\tt 10*7=70\\70/2=35\\35=A$

$\tt Perimeter:$

$\tt Step~1:$

To solve for the perimeter, or edges, of the triangle, we need to use the Pythagorean Theorem: a² + b² = c² to solve for the third side. We already know two measures: 10 and 7. Now we need to square them, add them together to get c², then take the root of that number.

$\tt 7^2=49\\10^2=100\\100+49=\sqrt{149}\\\sqrt{149$