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3 years ago

Please help with math

1 answer:

4 0

AlgebraIntroduction to Algebra
Variables
Expressions
Equations
Solution of an equation
Simplifying equations
Combining like terms
Simplifying with addition and subtraction
Simplifying by multiplication
Simplifying by division
Word problems as equations
Sequences VariablesA variable is a symbol that represents a number. Usually we use letters such as n, t, or x for variables. For example, we might say that s stands for the side-length of a square. We now treat s as if it were a number we could use. The perimeter of the square is given by 4 × s. The area of the square is given by s× s. When working with variables, it can be helpful to use a letter that will remind you of what the variable stands for: let n be the number of people in a movie theater; let t be the time it takes to travel somewhere; let d be the distance from my house to the park. ExpressionsAn expression is a mathematical statement that may use numbers, variables, or both.Example:The following are examples of expressions:2x3 + 72 × y + 52 + 6 × (4 - 2)z + 3 × (8 - z)

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6 + 2^3 • 3 = ? Show work

RSB [31]

Answer: =30

Step-by-step explanation:

This question it's about PEMDAS. This lesson it's about order of operations. p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtract. It can also go left to right.

do calculate with exponent first.

2³=2*2*2=8

6+8*3

multiply left to right.

8*3=24

add left to right.

6+24

=30

Hope this helps!

Thanks!

Have a great day!

4 0

3 years ago

prove “if two angles of one triangle are congruent to two angles of a second triangle, the the third angles of the triangles are

arsen [322]

Assume that,

The two angles of one triangle are congruent to two angles of a second triangle.

To prove: The third angles of the triangles are congruent.

Since, two angles of one triangle are congruent to two angles of a second triangle.

Therefore,

$\begin{gathered} \angle C=\angle F \\ \angle A=\angle D \end{gathered}$

Adding these two we get,

$\begin{gathered} \angle C+\angle A=\angle F+\angle D \\ 180-\angle B=180-\angle E\text{ (Using angle sum property of a triangle)} \end{gathered}$

Cancelling 180 on both sides, we get

$\begin{gathered} \angle B=\angle E \\ \therefore\angle B\cong\angle E \end{gathered}$

Hence, if two angles of one triangle are congruent to two angles of a second triangle, the the third angles of the triangles are congruent.

3 0

2 years ago

An item is priced at $13.76. If the sales tax is 7%, what does the item cost including sales tax?HURRY

elixir [45]

How To Solve It:

$13.76 x 0.07 = $0.96

$13.76 + $0.96 = $14.72

Answer:

$14.72

I hope this helps! :)

6 0

3 years ago

ariel is saving money for a new computer that costs $650. she has $150, which she puts into an account. then she adds $25 each w

Oksanka [162]

20 weeks

The initial equation is 25x+150=650. Since she already has 150, we can subtract that from the total to get 500. We now have that 25x=500. Divide by 25 on both sides to get 20 weeks

:)

5 0

3 years ago

W+1/8 =8 plzz help me i need it

Marina CMI [18]

Answer:

w = 7 7/8

Step-by-step explanation:

w + 1/8 = 8

First, subtract 1/8 from both sides of the equation

w + 1/8 = 8

- 1/8 - 1/8

w = 7 7/8

8 0

3 years ago

Read 2 more answers