MATHEMATICS HIGH SCHOOL

Translate the sentence into an equation.Nine times the sum of a number and 3 is 5.
Use the variable x for the unknown number.

Answers

Answer 1
Answer:

Answer: 9 (3 + x) = 5

Step-by-step explanation: hope this helps
Answer 2
Answer:

Answer:

9(X) x 3 =5

Step-by-step explanation:

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How do you find the domain of a function?

Answers

ok so domain means the set of numbers you are alowed to use

bsaically
domain=all real numbers except for those that make strange things happen

strange things are
1. dividing by zero
2. taking square root of negative
3. might be more, dunno

example
if y ou have
f(x)=3/x, domain is all real number except 0 since if x=0, then 3/0 is undifined
f(x)=3/(2+x), domain is all real except x=-2

for the negative sqrt
f(x)=√x, x cannot be negative, it goes from zero to positive infinity
f(x)=√(x-1), x cannot be less than 1, it has to be any number more than or equal to 1 (√0=0)


basically domain=all real number except for ones that make function comlex or undefined

You just see what's the range of x values the function covers.

Correct or incorrect? the difference of two numbers is always less than at least one of the numbers

Answers

the answer is "correct"

A pyramid has a height of 5 in. and a surface area of 90 in2. Find the surface area of a similar pyramid with a height of 10 in. Round to the nearest tenth, if necessary. a. 360 in2b. 180 in2 c. 22.5 in2 d. 3.6 in2

Answers

5/90=10/x→5x=900→x=900/5 , therefore SA = 180 in^2 for a height of 10. So, the correct answer for this proportion task is definitely the second option from the list represented above. b. 180 in2. I am pretty sure it will help you. Regards!

Need help with the question

Answers

Answer:

  a = -21

Step-by-step explanation:

Multiply the equation by the reciprocal of the coefficient of 'a'.

  (-7/6)(-6/7)a = (-7/6)(18)

  a = (-7)(18/6) = (-7)(3)

  a = -21

Answer:

I think the answer is a=-1/21

Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find all solutions whenever they exist.x+3y=9
3x-y=7

Answers

\left \{ {{x+3y=9~(3)} \atop {3x-y=7(-1)}} \right. \n \n \left \{ {{3x+9y=27} \atop {-3x+y=-7}} \right. \n \n10y=20\n \ny= (20)/(10) \ny=2

x+3y=9\nx=9-3y\nx=9-3.2\nx=3

S=\{3,2\}

One solution.
x+3y=9\n 3x-y=7\ / \cdot 3\n \n x+3y=9\n 9x-3y=21\n \n 10x=30\ /:10\n x=3\n \n x+3y=9\n 3+3y=9\n 3y=6\n y=2\n one\ solution - (3;2)

A pack of paper costs $3.75 including tax. Mr. Cooper wants to purchase packs of paper for his class and has a $20 budget. Write an inequality to solve for the number of packs of paper Mr. Cooper can purchase with his budget.$3.75x ≥ $20

$3.75x ≤ $20

$20x ≤ $3.75

$20x ≥ $3.75

Answers

If a pack of paper costs 3.75 including tax, and there is a $20 budget, then the equation to find out the answer would be 3.75p is greater or equal to $20. So the answer would be B. 3.75 would be multiplied by the tax and then applied up to $20. 
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