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3 years ago

The equation y-9+9=-17+9 is an example of which property of equality?

1 answer:

7 0

This is the concept of algebra. from the given equation;
y-9+9=-17+9
The original equation was y-9=-17
The subtraction was undone by applying inverse operation of adding 9 to get;
y-9+9=-17+9
y=-8
The aim of doing this was to obtain the value of the unknown which is y

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Find the x- and y-intercept of the line. –3x + 9y = 18

Mnenie [13.5K]

Line –3x + 9y = 18

x-intercept when y = 0
so -3x = 18
x = -6

y-intercept when x = 0
so 9y = 18
y = 2

answer
x-intercept (-6,0)
y-intercept (0, 2)

hope it helps

4 0

3 years ago

This recipe makes 6 portions of chocolate mousse.

trasher [3.6K]

Answer:

Chocolate - 420g

Eggs - 27

Lemon juice - 85ml

Sugar - 140g

Step-by-step explanation:

Given that:

Initial amount of ingredients:

Chocolate - 600g

Eggs - 36

Lemon juice - 100ml

Sugar - 200g

Amount of ingredients used :

Chocolate - 180g

Eggs - 9

Lemon juice - 15ml

Sugar - 60g

Amount of ingredient left :

Initial amount - Amount used :

Chocolate : 600g - 180g = 420g

Eggs : 36 - 9 = 27

Lemon juice : 100ml - 15ml = 85ml

Sugar : 200g - 60g = 140g

4 0

3 years ago

Nine times the difference of a number and one is equal to seven less than two times the number

Oksana_A [137]

9*(x-1)=2x-7
First get rid of your parenthesis by distributing.
9x-9=2x-7
Then all you have to do is isolate the variable
9x=2x+2
7x=2
so x= 2/7

8 0

3 years ago

12. How many students scored at least 60 on the test? a) 3 b) 4 c) 11 d) 7

Troyanec [42]

4
i don’t have an explanation

7 0

4 years ago

Da A Solve the equation 2x^2+3=0

Anika [276]

Answer:

x = ±i(√6 / 2)

General Formulas and Concepts:

Pre-Algebra

Equality Properties

Algebra I

Solving quadratics

Algebra II

Imaginary root i

√-1 = i

Step-by-step explanation:

Step 1: Define

Identify

2x² + 3 = 0

Step 2: Solve for x

[Subtraction Property of Equality] Subtract 3 on both sides: 2x² = -3
[Division Property of Equality] Divide 2 on both sides: x² = -3/2
[Equality Property] Square root both sides: x = ±√(-3/2)
Simplify: x = ±i(√6 / 2)

4 0

3 years ago