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3 years ago

Write a world sentence for the aquation x -14 = 52

Mathematics

1 answer:

ladessa [460]3 years ago

7 0

This equation would be read aloud as: "The difference between a number and fourteen is equal to fifty two."

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The sum of two angles is 90°. The difference of twice the larger angle and the smaller angle is 105º. The system of linear equat

denpristay [2]

Answer:

x = 65, y = 25

Step-by-step explanation:

Given system of linear equations:

x + y = 90
2x - y = 105

Add up the equations to eliminate y:

x + 2x = 90 + 105
3x = 195
x = 65

Find y:

y + 65 = 90
y = 90 - 65
y = 25

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2 years ago

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The tens digit of a certain number is five more than the units digit. The sum of the digits is 9. Find the number. Help! I need

JulsSmile [24]

The Answer is 27 because 2+7=9 and 7-2=5

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2 years ago

I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

7 0

3 years ago

1. For the function f(x) = 3x + 1, find f(-2). (substitute -2 in for x)

puteri [66]

Answer:

f(-2) = -5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Function Notation

Step-by-step explanation:

Step 1: Define

f(x) = 3x + 1

f(-2) is x = -2

Step 2: Evaluate

Substitute in x: f(-2) = 3(-2) + 1
Multiply: f(-2) = -6 + 1
Add: f(-2) = -5

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3 years ago

Guys u have to help me im trying for one hour

Tpy6a [65]

Answer:

12 is the answers for the question

Step-by-step explanation:

please give me brainlest

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2 years ago

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