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3 years ago

N*7=7n

Mathematics

2 answers:

Anettt [7]3 years ago

3 0

Answer:

Step-by-step explanation:

law of communicative multiplication

Alborosie3 years ago

3 0

Answer is letter c trust me

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Which ordered pair is a solution of the system of equations shown in the graph below?

Ad libitum [116K]

Answer: A

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Which is the correct answer? (explain how you got your answer)

Otrada [13]

Answer:

Option B. f¯¹(x) = ³√(– x – 9)

Step-by-step explanation:

From the question given above:

f(x) = – x³ – 9

f¯¹(x) =?

We can obtain the inverse f¯¹(x) of the above equation by doing the following:

f(x) = – x³ – 9

Replace f(x) with y

y = – x³ – 9

Interchange x and y

x = – y³ – 9

Make y the subject . This is illustrated below:

x = – y³ – 9

Rearrange

x + 9 = – y³

Multiply through by –1

–(x + 9) = y³

y³ = – x – 9

Take the cube root of both side

y = ³√(– x – 9)

Replace y with f¯¹(x)

f¯¹(x) = ³√(– x – 9)

Thus, the inverse of the function

f(x) = – x³ – 9

f¯¹(x) = ³√(– x – 9)

8 0

3 years ago

22. If the point (a, 3) and (-2, b) lie on the line given by the equation 2y-x=6, then

saul85 [17]

It’s D
2y-x=6
2(3)-x=6
6-x=6
-x=6-6
-x=0
Divided by- it will not gonna change
2y-x=6
2y-(-2)=6
2y+2=6
2y=6-2
2y/2=4/2
Y=2

5 0

3 years ago

Simplify 8(2)+2 with correct answer

Nataly [62]

Answer: The sum of the equation is 18

Step-by-step explanation:

5 0

4 years ago

Read 2 more answers

DEF is a right angled triangle calculate the length of EF correct to 3 sigificant figures

Vesnalui [34]

Answer:

$\displaystyle EF \approx 15.9$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Trigonometry

[Right Triangles Only] SOHCAHTOA
[Right Triangles Only] cosθ = adjacent over hypotenuse

Step-by-step explanation:

Step 1: Define

Angle θ = 28°

Adjacent Leg = EF = x

Hypotenuse = DF = 18

Step 2: Solve for x

Substitute in variables [Cosine]: $\displaystyle cos28^\circ = \frac{x}{18}$
[Multiplication Property of Equality] Multiply 18 on both sides: $\displaystyle 18cos28^\circ = x$
Evaluate trig: $\displaystyle 18(0.882948) = x$
Multiply: $\displaystyle 15.8931 = x$
Rewrite: $\displaystyle EF = 15.8931$
Round: $\displaystyle EF \approx 15.9$

8 0

3 years ago