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3 years ago

Please help this is an easy question I just don't understand

Mathematics

1 answer:

Andre45 [30]3 years ago

7 0

Answer:

total interior angles = (n - 2)180°

Step-by-step explanation:

look up "interior angles of a polygon"

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Find the exact value of arccos (sin (pi/6). Explain your reasoning.

Tresset [83]

We have to find the exact value of: arc cos ( sin ( π /6 ) ).
We know that:
sin ( π/6 ) = sin 30° = 1/2
Arc cos is the inverse function of cosine.
arc cos ( 1/2 ) = 60° = π/3

4 0

4 years ago

When 118 is divided by 11, what is the quotient and the remainder

zlopas [31]

Remainder would be 8 I believe idk

4 0

4 years ago

Priya starts with $50 in her bank account. She then deposits $20 each week for 12 weeks.

liubo4ka [24]

Answer:

10 weeks

Step-by-step explanation:

20x+50=250

First subtract 50 from both sides, which gives you 20x=200

then divide 20 from both sides which gives you x=10

3 0

3 years ago

4. Solve the equation using the quadratic formula.

Vikentia [17]

Answer:

A. x = -2, x = 1.25

Step-by-step explanation:

Use the quadratic formula

x = $\frac{-b+\sqrt{b^{2}-4ac } }{2a}$

Once in standard form, identify a, b, and c from the original equation and plug them into the quadratic formula.

4x² + 3x - 10 = 0

a = 4

b = 3

c = - 10

x = $\frac{-3+\sqrt{3^{2}-4x4(-10) } }{2x4}$

Simplify

Evaluate the exponent

x = $\frac{-3+\sqrt{9-4x4(-10)} }{2x4}$

Multiply the numbers

x = $\frac{-3+\sqrt{9+160} }{2x4}$

Add the numbers

x = $\frac{-3+\sqrt{169} }{2x4}$

Evaluate the square root

x = $\frac{-3+13}{2x4}$

Multiply the numbers

x = $\frac{-3+13}{8}$

Separate the equations

To solve for the unknown variable, separate into two equations: one with a plus and the other with a minus.

x = $\frac{-3+13}{8}$

x = $\frac{-3-13}{8}$

Solve

Rearrange and isolate the variable to find each solution

x = - 2

x = 1.25

6 0

3 years ago

Read 2 more answers

The length of a rectangle is 5/2 units greater than twice its width. If it’s width is w, which expression gives the perimeter of

SashulF [63]

P = 2(L + W)
L = 2W + 5/2

P = 2(2W + 5/2 + W)
P = 2(3W + 5/2)
P = 6W + 5
P - 5 = 6W
(P - 5) / 6 = W or 1/6P - 5/6 = W <===

3 0

3 years ago

Please help this is an easy question I just don't understand ​

Please help this is an easy question I just don't understand