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AleksAgata [21]

3 years ago

15

The perimeter of the base of a right square pyramid is 32 cm. The height of the pyramid is 8 cm. What is the volume of the pyram

id?

1 answer:

Andrei [34K]3 years ago

6 0

The formula is V = 0.5 X b X a X h.
Plug in numbers X is a multiplication sign

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Write the equation of the line that passes through the points (3,-8) and (-8, 1).

NemiM [27]

Answer:In order to write an equation for a line when we are only given 2 points it passes through, we first need to determine the slope of the line. The slope of the line is found by dividing the difference in the y-coordinates of the 2 points by the difference in the x-coordinates of the 2 points. (mathematically known as rise over run), (you may remember hearing this in class)

Step-by-step explanation:

y1-y2 / x1-x2 is the formula we will use to find the slope.

Pick one of the coordinates to be 1 and let the other be 2. We will let (3, 8) be 1 and (1, 0) be 2 because it has a 0 and subtracting 0 is easier.

Remember - whichever point contains y1, must also contain x1.

Our slope is found by substituting

(8 - 0) / (3 - 1) =

8 / 2 = 4. So the slope is 4.

Our equation for the line must be in the form of

y = mx + b (m is the slope and be is the y-intercept, where the line crosses the y-axis)

Again, choose a point and we will finish the equation. Let's use (1, 0). Always easier to use when there is a 0.

We will substitute our coordinates into the equation -

y - y1 = m(x - x1)

y - 0 = 4(x - 1)

y = 4x - 4 - your equation.

You can check your work by using the other point, (3, 8)

y = 4x - 4

8 = 4(3) - 4

8 = 12 - 4

Because this equation is true, your equation for the line is correct.

Hope this helps.

7 0

3 years ago

What does ‘x’ equal

Dmitriy789 [7]

Answer:

x=(-9)

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

(−2/3)(9+x)=0

(−2/3)(9)+(−2/3)(x)=0(Distribute)

−6+−2/3x=0

−2/3x−6=0

Step 2: Add 6 to both sides.

−2/3x−6+6=0+6

−2/3x=6

Step 3: Multiply both sides by 3/(-2).

(3−2)*(−2/3x)=(3−2)*(6)

x=−9

6 0

3 years ago

8) slope and y-intercept from graphs

Artyom0805 [142]

Answer:slope-0.75 y intercept 1

Step-by-step explanation:

4 0

3 years ago

Giving 20 Pts Pls Help ASAP!

geniusboy [140]

Answer: base is 12

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Please help me please

spayn [35]

Answer:

A. 34°

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

<u>Trigonometry</u>

[Right Triangles Only] SOHCAHTOA
[Right Triangles Only] tanθ = opposite over adjacent
Inverse Trig

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

Angle θ = <em>x</em>

Opposite leg AC = 24

Adjacent leg CB = 35

<u>Step 2: Solve for </u><em><u>x</u></em>

Substitute in variables [Tangent]: $\displaystyle tanx^\circ = \frac{24}{35}$
Inverse Trig [Tangent]: $\displaystyle x^\circ = tan^{-1}(\frac{24}{35})$
Evaluate: $\displaystyle x = 34.439^\circ$
Round: $\displaystyle x \approx 34^\circ$

4 0

3 years ago