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KatRina [158]
3 years ago
13

What does algebra mean?

Mathematics
1 answer:
Xelga [282]3 years ago
5 0
The part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.
You might be interested in
I think of a number and add 6. The result is equal to twice the first number
brilliants [131]

Answer:

A. X+6=6x

X+6=6(x)

Step-by-step explanation:

B. 3+6=3×6

9=18

5 0
3 years ago
How do I write 3/4 as a percent
Pani-rosa [81]

Answer:

3/4 written as a percent would be 75%

7 0
2 years ago
Read 2 more answers
Hey you can help me out
Ivenika [448]

Answer:

<u><em>O D) 540°</em></u>

Step-by-step explanation:

<em>The internal angle sum of a pentagon is 540°.</em>

<em>No shape has an internal angle sum of 90°, 180° is angle sum of a triangle, and 360° for a quadrilateral.</em>

<em></em>

<em>Hope it helps.</em>

<em>;)</em>

<em><3</em>

8 0
2 years ago
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Write the equation for the word problem and solve. You bought a magazine for $5 and four erasers. You spent a total of $25. How
nikitadnepr [17]

Answer: each eraser cost 5 dollors                

Step-by-step explanation: Simplifying

25 = 5 + 4e

Solving

25 = 5 + 4e

Solving for variable 'e'.

Move all terms containing e to the left, all other terms to the right.

Add '-4e' to each side of the equation.

25 + -4e = 5 + 4e + -4e

Combine like terms: 4e + -4e = 0

25 + -4e = 5 + 0

25 + -4e = 5

Add '-25' to each side of the equation.

25 + -25 + -4e = 5 + -25

Combine like terms: 25 + -25 = 0

0 + -4e = 5 + -25

-4e = 5 + -25

Combine like terms: 5 + -25 = -20

-4e = -20

Divide each side by '-4'.

e = 5

Simplifying

e = 5

7 0
3 years ago
40 = 90^2/16 sinx cosx find x
lbvjy [14]

Answer:

<h2>x = 4.545</h2>

Step-by-step explanation:

Given the expression

40=\frac{90^2}{16}  sinxcosx\\\\Cross\ multiplying;\\\\16*40 = 90^2 sinxcosx\\\\640 =  90^2 sinxcosx\\\\\frac{640}{8100} = sinxcosx\\ from\ trig\ identity, sin2x = 2sinxcosx\\sinxcosx = sin2x/2\\

Hence, \ \frac{640}{8100} = \frac{sin2x}{2}  \\\\\frac{2*640}{8100} = sin2x\\ \\\frac{1280}{8100}=sin2x\\ \\0.158 = sin2x\\\\2x = sin^{-1} 0.158\\\\2x = 9.09\\x = 9.09/2\\x =4.545

5 0
3 years ago
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