How to know where the ( ) go in a math problem

Answers

Answer 1

Answer: i hope this helps

the brackets can represent multiplication or group large
for example

5 × 4 + 7 × 9
(5 × 4) + (7 × 9)
20 + 63
= 83

or

73 + 92 + 54 + 96 × 6

(73 + 92) + (54 + 96) × 6

165 + 150 × 6

315 × 6

= 1890

Answer 2

Answer: Also
2(3)=6 show as multiplication

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Solve 2y+4x=8 fory. Thenfindthevalueofyforeachvalueof x=-2,1,3. y = _____________________ (equation)When x=-2, y=______ x=1, y=______ x=3, y=______

Answers

Answer: Answers below

Step-by-step explanation:

$2y+4x=8$

Solve for y.

$2y+4x-4x=8-4x\n2y=8-4x\ny=(8-4x)/(2)$

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When x = -2; y = 8

$y=(8-4(-2))/(2)\ny=(8+8)/(2)\n y=(16)/(2)\n y=8$

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When x = 1 ; y = 2

$y=(8-4(1))/(2)\ny=(8-4)/(2)\n y=(4)/(2)\n y=2$

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When x = 3 ; y = -2

$y=(8-4(3))/(2)\ny=(8-12)/(2)\n y=(-4)/(2)\n y=-2$

The sum of the first and third of three consecutive even integers is 154. Find the three even integers.

Answers

x + (x+2) = 154
combine like terms
2x + 2 = 154
subtract 2
2x = 154
divide by 2
x = 76

so the two numbers are 76 and 78

Evaluate the following expression. 7^0

Answers

remember
x^0=1
anything to teh zero power=1
the reason is
2^3=1*2*2*3 means 3 of them
2^2=1*2*2 means 2 of them
2^1=1*2 menas 1 of them
2^0=1*no 2's means 1 of them

result is 2

One of the rules of exponents is that any number raised to the zero power is 1, so

7^0 = 1

How do you factor 64-x^2 completely?

Answers

$64-x^2$

$This \ fits \ the \ form \ a^2-b^2$

$Rewrite \ it \ where \ a=8 \ and \ b=x$

$Use \ Difference \ of \ Squares$ $a^2-b^2=(a+b)(a-b)$

$(8+x)(8-x)$

How would you write 2,405 using a power of ten

Answers

Answer:2405.0

Step-by-step explanation:

Answer:

2405^10=6.4736737e+33

Task 4—Solving Rational EquationsUsing the equation below as a model, fill in numbers in the place of a and b to create a rational equation that has an extraneous solution.

x + a (over(fraction)) ax = b (over(fraction)) x

Part 1. Show all work to solve for x in the equation and check the solution.

Part 2. Explain how to identify the extraneous solution and what it means.

Answers

Answer:

x = 7 is a solution

x = -2 is an extraneous solution.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Using the equation below as a model, fill in numbers in the place of a and b to create a rational equation that has an extraneous solution.

X + 4 / 4x = 8 / x

Part 1. Show all work to solve for x in the equation and check the solution.

X + 4 / 4x = 8 / x

x(x + 4) = (4x)8

x^2 + 4x = 32x

x^2 + 4x - 32x = 32x - 32x

x^2 - 28x = 0

x(x - 28) = 0

X = 0 or x = 28

Part 2. Explain how to identify the extraneous solution and what it means.

The solution x = 0 is extraneous because you are not allowed to divide by 0.

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