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3 years ago

Please help me I don’t understand

Mathematics

1 answer:

Ganezh [65]3 years ago

7 0

Hello!

The least common denominator is the lowest common factor between the two denominators

The lowest common denominator is 15

Hope this helps!

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Adena, Julius, and Tia volunteered to read to children at the public library. Julius worked two hours less than Tia. Adena worke

mafiozo [28]

Answer:

28 hours

Step-by-step explanation:

Adena, Julius, and Tia volunteered to read to children at the public library.

Let us represent, the number of hours worked by

Adena = x

Julius = y

Tia = z

Julius worked two hours less than Tia.

y = z - 2

z = y + 2

Adena worked twice as many hours as Julius.

x = 2y

Altogether they worked 58 hours.

x + y + z = 58.... Equation 1

We substitute 2y for x and y + 2 for z in Equation 1

2y + y + y + 2 = 58

4y + 2 = 58

Collect like terms

4y = 58 - 2

4y = 56

y = 56/4

y = 14

We are the find the number of hours Adena worked which is represented by x

Note that:

x = 2y

y = 14, hence,

x = 2 × 14

x = 28 hours

Therefore, the number of hours Adena worked is 28 hours

4 0

2 years ago

1. Determine the missing value in this table of values for the function y = 2

koban [17]

Answer:

-1

Step-by-step explanation:

Ghana is a great place to work for and it is the most versatile and affordable way to do business with you in the future of the following statements is of a hole in your heart to be added

5 0

2 years ago

I can’t seem to find the value of n in this peoblem

Annette [7]

Answer:

Step-by-step explanation:

you can always use guess-and-check:

124 seems rather high

(6)P(2) = 6!/4! = 6x5 ≠ 72

(9)P(2) = 9!/7! = 9x8 = 72

3 0

2 years ago

Read 2 more answers

Given AB is tangent to circle C at point B, what is the circumference of circle C?

faltersainse [42]

Given:

Given that AB is a tangent to circle C.

The length of AB is (2r -1)

The length of AC is (r + 1) + r

The length of BC is r.

We need to determine the circumference of the circle C.

Value of r:

The value of r can be determined using the Pythagorean theorem.

Thus, we have;

$AC^2=AB^2+BC^2$

Substituting the values, we have;

$[(r+1)+r]^2=(2r-1)^2+r^2$

Simplifying, we have;

$(2r+1)^2=(2r-1)^2+r^2$

Expanding the terms, we get;

$4r^2+4r+1=4r^2-4r+1+r^2$

$4r^2+4r+1=5r^2-4r+1$

Simplifying the values, we have;

$4r=-4r+r^2$

Adding both sides of the equation by 4r, we get;

$8r=r^2$

$0=r^2-8r$

$0=r(r-8)$

Thus, $r=0 \ or \ r=8$

Since, the radius of the circle cannot be 0.

Hence, the radius of the circle is 8.

Circumference of the circle:

The circumference of the circle can be determined using the formula,

$C=2 \pi r$

Substituting r = 8, we get;

$C=2 \pi (8)$

$C=16 \pi$

Thus, the circumference of the circle is 16π

Hence, Option A is the correct answer.

5 0

3 years ago

2. Perpendicular to y=1/2x -6 that passes through (6,-4) PLEASE HELP ME ASAP

iren [92.7K]

Answer:

To get the slope (which we'll call n) of a line perpendicular to another line with slope (a/b), use

$n = \frac{-b}{a}$

Then we just plug in the point we want to cross and solve for the constant.

Step-by-step explanation:

we see that m = $\frac{1}{2}$

so, $n = -\frac{2}{1} = -2$

now we have the equation

$-2x + b = y$

plugging in (6, -4) we get

$-2(6) + b = -4\\-12+b = 4\\b=4+12=16$

This gives us our function

$y = -2x + 16$

3 0

1 year ago