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Mathematics

1 answer:

Mrrafil [7]3 years ago

3 0

Answer:

Deandre runs 4 miles in 30 minutes

Deandre runs 1 mile in 30/4 minutes=7.5minutes

Deandre runs 4x7.5 miles in 48 minutes

=30miles

Step-by-step explanation:

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In the following diagram,

olga2289 [7]

Answer:

x + 75 = 180, as these two angles form a straight angle.
x = 180° - 75° = 105°

y and x are supplementary angles as p is transversal of l and m:

y + x = 180°
y = 180° - x = 180° - 105° = 75°

z is same as 86° as vertical angles:

z = 86°

w and z are supplementary angles as g is transversal of l and m:

w + z = 180°
w = 180° - z = 180° - 86° = 94°

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3 years ago

A bag contains five red marbles, two orange marbles, one yellow marble, and two green marbles. Two marbles are drawn from the ba

Anvisha [2.4K]

The answer is

$\frac{2}{10} \div \frac{2}{9} = .04444$
the probability of choosing an orange marble is 2/10 because there are 2 orange marbles and 10 marbles in total.

the probability of choosing a green marble is 2/9 because there are 2 green marbles and 9 marbles in total (because you already picked one marble out of the bag thereby decreasing the total number of marbles in all).

when you multiply the probability of these two events you get .04444 which is the probability of both events happening simultaneously.

4 0

3 years ago

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Triangle + triangle + square = 23 Triangle x square = 60 Triangle? Square?

Ira Lisetskai [31]

2 triangle+square=23
square=60/triangle

2 triangle+60/triangle=23

2 triangle^2+60=23 triangle

2 triangle^2-23 triangle+60=0

solving quadratic equation we get

triangle=15/2 , 4
15/2 is not possible so triangle=4
square=15

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4 years ago

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The sale price of an item is $15 after a 70% discount is applied. What is the original price of the item?

sukhopar [10]

21.428571428571428571428571428571

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3 years ago

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SImplify: x+3/9/x+12/6 Really stuck on this problem

Aleksandr-060686 [28]

To simplify this, first, multiply the whole equation with x to get rid of the denominator.

[ x + 3/9/x + 12/6] * x
Simplify 12/6 beforehand, which is 2.
[ x + 3/9/x + 2] * x
Distribute x to each of the terms
x2 + 3/9 + 2x

This is already a simplified equation. If you wan to further simplify by getting rid of the fraction, multiply the whole equation with 9 to eliminate the denominator.

[x2 + 3/9 + 2x]*9
9x2 + 3 + 18x
9x2 + 18x + 3 =0

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3 years ago