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3 years ago

Please help me with the last question

Mathematics

1 answer:

Greeley [361]3 years ago

7 0

You'd solve this by creating the equation
20 + 6x - 1 + x + 14 = 180
33 + 7x = 180
- 33
7x = 147
÷ 7
x = 21
(because angles in a triangle add up to 180°)
And then you'd substitute in the value of x, so
6 × 21 = 126
126 - 1 = 125° = Angle A
21 + 14 = 35° = Angle C
I hope this helps!

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Write an algebraic expression for each word phrase the quotient of n and 6

CaHeK987 [17]

"The quotient of" tells you to use division. The order tells you which is the numerator and which is the denominator respectively.

n/6 is your answer. Or $\frac{n}{6}$

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3 years ago

Anybody good in pre Calculus and know how to do #3 or #4?

lys-0071 [83]

Answer:

3. 0

4. n = -2

Step-by-step explanation:

I haven't taken pre-calc but this looks a lot like algebra.

For #3, just plug in -2 for the x values, so:

x^2 + 4x +4

(-2)^2 + 4(-2) + 4

= 4 - 8 + 4

= 0

For #4, move the variables to one side and solve( im not sure what the pi is for tho, or is that a n?):

5n + 6 = -3n - 10

add 3n to both sides

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7 0

3 years ago

Here is a number pattern: 23, 26, 30, 35, 41.

beks73 [17]

Answer:

Step-by-step explanation:

The number sequence increases by 1.

23+3=26

26+4=30

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2 years ago

Read 2 more answers

The width of a rectangle is shown below:

Phoenix [80]

The difference between the y-coordinates is 7 units. If the area is to be 42 square units, the missing coordinates must be 42/7 = 6 units to the right of those shown.
B = A +(6, 0) = (-4, 4) +(6, 0) = (-2, 4)

D = C +(6, 0) = (-4, -3) +(6, 0) = (-2, -3)

The appropriate choice is the last one, ...
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3 0

3 years ago

A normal curve with mean = 25 has an area of .3531 between 25 and 34. What is the standard deviation for this normal curve?

Naddik [55]

Answer:

The desviation is 8 4/7 or 8.571

Step-by-step explanation:

The conversion for any variable X to a standard z is

$Z=\frac{X-\[Mu]}\\{\[Sigma]}$

where mu is the mean and sigma de desviation

You can find the value of Z whith the tables of the accumulated probability function. The accumulated probability for the mean is 0.5 .Remenber that the accumlated probability function represent the area at the left of an abscissa. Then

0.5+0.3531=0.8531

Acording to the accumulated probability function table, a Z=1.05 has an area of 0.8531 at its left.

Now it is only solving the equation

$\[Sigma]=\frac{X-\[Mu]}{Z}$

σ= $\frac{34-25}{1.05}$

σ=8.571

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3 years ago