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3 years ago

15

A gasoline service station offers 20 cents off the regular price per gallon every tuesday. what equation relates the discounted

price to the regular price on that day?

1 answer:

Leni [432]3 years ago

3 0

R - 0.20 < r would be your answer

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Volume problem.... Please help

vladimir1956 [14]

Answer:

c

Step-by-step explanation:

volume of cylinder = πr^2h

r = 6.5

h = 13+13+13 = 39

cylinder volume = 1647.75π cm^3

volume of one sphere = 4/3 π r^3

= 366.16π cm^3

space not occupied by tennis balls = 1647.75π-3(366.16π)=549.25π cm^3

5 0

2 years ago

The J.O. Supplies Company buys calculators from a non-US supplier. The probability of a defective calculator is 10 percent. If 3

RSB [31]

Answer:

There is a 24.3% probability that one of the calculators will be defective.

Step-by-step explanation:

For each calculator, there are only two possible outcomes. Either it is defective, or it is not. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

The probability of a defective calculator is 10 percent.

This means that $p = 0.1$

If 3 calculators are selected at random, what is the probability that one of the calculators will be defective

This is P(X = 1) when n = 3. So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 1) = C_{3,1}.(0.1)^{3}.(0.9)^{2} = 0.243$

There is a 24.3% probability that one of the calculators will be defective.

3 0

3 years ago

Isabel runs 3 miles in 25 minutes. At the same rate, how many miles would she run in 20 minutes?

Alexandra [31]

Answer:

2.4 miles

Step-by-step explanation:

3/25=x/20

25x divided by 25

60 divided by 25

x=2.4

4 0

3 years ago

Help!! (Edgar's midterm have two screenshot's)

Bezzdna [24]

Answer:

Step-by-step explanation:

2)

80 +67 +97+ 98 +85 +72 = 499

499/6=83.1666666667

Average: 83.1666666667

3)

a) <em>97</em> <u>93</u> 92 90 90 <u>90</u> <em>86</em> =90

median of Edgars grades for his midterm is 90

<em>99</em> <u>93</u> 93 89 88 <u>88</u> <em>86</em>

median of Edgars grades for his trimester is 89

7)

(z+9+18)= z+27 (remember don't mix the numbers if they are attached to the x)

(z+18+9)= z+27 (because adding is both ways the same)

a) a + b =b + a

Geometry

1.

a) 6x^2

b)The surface area of a cube = 6a^2 where a is the length of the side of each edge of the cube. Put another way, since all sides of a cube are equal, x is just the length of one side of a cube

c) The unit would be sq(squared) feet

4 0

3 years ago

Two bees have found a food source. The first bee’s path to the hive follows the line . The second bee’s path follows the line y

choli [55]

The coordinate of the hive is the point of interaction of the two lines.
We have the two equations:
$y=4/5x\\y=-2x+3\\\text{By substitution we get:}\\4/5x=-2x+3\\\text{Solving the above equation for x we get:} x=15/14\\\text{Then }y=4/5\times15/14=6/7\\\text{The coordinates of the hive are then :}(15/14,6/7)$

6 0

3 years ago