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Lisa [10]
3 years ago
13

Need help with question 1

Mathematics
2 answers:
Elodia [21]3 years ago
8 0

Answer:

{x = -1,\, y = -4 \text{ or } (-1, -4)}

Step-by-step explanation:

Sunny_sXe [5.5K]3 years ago
7 0

Answer:

\large \boxed{x = -1,\, y = -4 \text{ or } (-1, -4)}

Step-by-step explanation:

ƒ(x):

-x + y = -3

For easier calculations, add x to each side. Then

y = -3 + x

x =  1:  y = -3 + 1                = -2

x = 0:  y = -3 + 0               = -3

x = -1: y =  -3 + (-1) = -3 - 1 = -4

g(x):

-6x + y = 2

y = 2 + 6x

x =  1: y = 2 + 6(1)              =  8

x = 0: y = 2 + 0(1)              =  2

x = -1: y = 2 + 6(-1) = 2 - 6 = -4

\begin{array}{ccc}\mathbf{x}& \mathbf{f(x)}& \mathbf{g(x)}\\\mathbf{1} & -2 & 8\\\mathbf{0} & -3 & 2\\\mathbf{-1} & -4 & -4\\\end{array}\\\text{The table shows that f(x) = g(x) = -4 when x = -1.}\\\text{The solution to both equations is $\large \boxed{\mathbf{x = -1,\, y = -4} \text{ or } \mathbf{(-1, -4)}}$}

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A disc has a diameter of centimeters while a mini disc has a diameter of centimeters. Write the ratio of the mini disc diameter
Dafna1 [17]

Answer:

2 : 3

Step-by-step explanation:

A disc has a diameter of 21 cm while a mini disc has a diameter of 14cm. Write the ratio of the mini disc diameter to the disc diameter.

Answer: Let the diameter of the mini disc be d_1 while the diameter of the disc be d_2. To get the ratio of the mini disc diameter to the disc diameter, we just simply have to divide the diameter of the mini disc by the diameter of the disc and then represent the fraction in ratio form. The ratio of the disc diameters is given by:

Ratio of the mini disc diameter to the disc diameter = Diameter of mini disc / diameter of disc

Ratio of the mini disc diameter to the disc diameter = \frac{14}{21}=\frac{2}{3}

Ratio of the mini disc diameter to the disc diameter = 2 : 3

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3 years ago
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How to solve the equation 9v = 8 + v
zloy xaker [14]
Here are some things you should know when solving algebraic equations.

If you add an expression to both sides of an equation, the resulting equation will have the same solution set as the original equation. In other words, they will be equivalent. This is true for all operations. As long both sides are treated the same, the equation will stay balanced.

You will also need to know how to combine like terms. But what are like terms to begin with? Like terms are defined as two terms having the same variable(s) (or lack thereof) and are raised to the same power. In mathematics, something raised to the first power stays the same. So, 5x and 10x are like terms because they both have the same variable and are raised to the first power. You don’t see the exponents because it doesn’t change the value of the terms.

To combine like terms, simplify add the coefficients and keep the common variable(s) and exponent.

The distributive property is another important rule you will need to understand.

The distributive property is used mostly for simplifying parentheses in expressions/equations. 

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So, now we can simplify our expression.

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Now let's solve your equation.

9v = 8 + v
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3 years ago
What is 7/12 divided by 36?
Georgia [21]
7/12 = 0.84
0.84/36 = 0.0233·
3 0
3 years ago
One number is 8 more than another number, and their sum is 20. Find the numbers.
melomori [17]

Answer:

First number=6

Second number=14

Step-by-step explanation:

Let the first number be x

So the second number is x+8

So the sum of the two is

X+x+8=20

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X=12/2

=6

The second number will x+8

So 6+8=14

First number=6

Second number=14

6 0
3 years ago
Read 2 more answers
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