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2 years ago

What are the answers to these?

Mathematics

2 answers:

PilotLPTM [1.2K]2 years ago

6 0

A) -3

B) 5

C) -2

D)-6

i have to write 20 characters so sisiasskklsa

kkurt [141]2 years ago

5 0

Answer:

a) -3

b)5

c)-2

d)-6

Step-by-step explanation:

4 - 7 =-3

4 is positive and 7 is negative

a positive minus a negative is equal to a negative

3 is negative and 8 is positive, but 8 is bigger than 3, so take the sign of the bigger number which is 8.

c) is the same as question b

same signs rule

a negative + a negative is = to negative

positive and a positive is = to a positive

a negative +/_ a positive = a negative

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Find the number of permutations of the first 9 letters of the alphabet, taking 4 letters at a time.

Vinil7 [7]

Solution-

First 9 letters of alphabet are- A,B,C,D,E,F,G,H,I

Total number of ways of selection of 4 letters from 9 alphabets = 9C4

=9!÷((4!).(9-4)!) = 9!÷(4!×5!) = (9×8×7×6)÷(24) = 126

The number of ways of arranging these 4 numbers = 4! = 24

∴ Total number of possible permutations = 9C4×4! = 126×24 = 3024

∴ option number 2 is correct.

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Answer:

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3 years ago

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Solution:

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Answer:

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3 years ago

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Solve the right angle trig. round to the nearest tenth.

Tresset [83]

Answer:

x ≈ 58.9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Geometry

[Right Triangles Only] tan∅ = opposite over adjacent

Step-by-step explanation:

Step 1: Define

We are given a right triangle. We can use trig to find the missing side length.

Step 2: Identify Variables

POV from the angle measure

Angle = 23°

Opposite Leg = 25

Adjacent Leg = x

Step 3: Solve for x

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Multiply x on both sides: xtan23° = 25
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3 years ago

What is the solution to log2 (9x)- log2^3=3?

Svet_ta [14]

Answer:

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

Step-by-step explanation:

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log x - log y = log ( $\frac{x}{y}$ )

$log_{b}$ x = n ⇒ x = $b^{n}$

Given

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4 years ago