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Jlenok [28]
3 years ago
11

Two friends, Selma and Khalid are revising algebra. Khalid says: 'I am thinking of a number. If you multiply it by 3 and subtrac

t 6, you get the same answer as adding the number to 7'. Call Khalid's number y and form an equation
Mathematics
1 answer:
kogti [31]3 years ago
5 0

Answer:

Equation: 3y - 6 = y + 7

y = 6.5

Step-by-step explanation:

Step 1: Write out equation

3y - 6 = y + 7

Step 2: Solve for <em>y</em>

2y - 6 = 7

2y = 13

y = 13/2 or 6.5

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masha68 [24]

Answer:

The correct answer is -9.73°.

Step-by-step explanation:

The procedure is:

sin(x + 34)°=cos(2x+20)°

⇒ tan\frac{x+34}{2x+20} = 1 ; [assuming cos (2x+20)° \neq0]

⇒ x + 34 = 45 × ( 2x +20)

⇒ x + 34 = 90x + 900

⇒ 89x = -866

⇒ x = -9.73

and also 2x + 20 = 90° ⇒ x = 35°; but this does not satisfy the given equation.

Therefore the value of x is given by -9.73°.

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3 years ago
How are exponents and logarithms related? give an example with you explanation
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Veronika [31]

Answer:

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Step-by-step explanation:

183-160=23 or 160+23=183

Hope this helps!

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Step-by-step explanation:

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Hope this helped!
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