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3 years ago

What is the solution set of x2 – 10 = 30x?

Mathematics

2 answers:

kobusy [5.1K]3 years ago

3 0

Answer:

15+sqrt(235), 15-sqrt(235)

Step-by-step explanation:

X^2-30x-10=0

Use quadratic formula (b+-sqrt(b^2-4(a)(c)))/(2(a))

a=1, b=-30, c=-10

lesantik [10]3 years ago

3 0

Answer:

Step-by-step explanation:

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I’m confused on this

dexar [7]

$\huge\boxed{x=25}$

The mistake is in Step 1. The solver should have also squared $9$ when squaring the other side of the equation.

<h3>Correctly solving</h3>

$\begin{aligned}\sqrt{3x+6}&=9\\(\sqrt{3x+6})^2&=9^2\\3x+6&=81\\3x+6-6&=81-6\\3x&=75\\\frac{3x}{3}&=\frac{75}{3}\\x&=25\end{aligned}$

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2 years ago

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Cindy owns a rectangular lot that is 18 yards long and 45 feet wide. She is going to cover the lot with square pieces of sod. If

DiKsa [7]

FIND LOT AREA:
Area = length * width
A= 18 feet * 45 feet
A= 810 feet squared

FIND # OF YARDS:
1 yard= 3 feet

Divide number of square feet by number of feet per yard.
Yards= 810 ÷ 3
Yards= 270

FIND PRICE OF SOD:
multiply number of yards by price per square yard.
Price= 270 yards * $12/yard
Price= $3,240

ANSWER: Cindy will pay $3,240 to cover the lot with sod.

Hope this helps! :)

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3 years ago

A _[blank 1]_ is a number whose only factors are 1 and itself. If a number has other factors besides 1 and itself, it is called

kykrilka [37]

Numbers whose only factors are 1 and itself is known as prime numbers , numbers whose factors besides 1 and itself are composite numbers, we can use the sieve of Eratosthenes to determine whether the number is prime or composite.

Given a paragraph in which there are blanks:

A _____ is a number whose only factors are 1 and itself. If a number has factors besides 1 and itself, it is called a _____. You can use divisibility rules or _______ to help you determine whether a number is prime or composite.

We are required to fill the blank with appropriate options.

We have to fill "prime numbers" in the first blank.

We have to fill "composite numbers" in the second blank.

We have to fill "the sieve of Eratosthenes" in the third blank.

Hence numbers whose only factors are 1 and itself is known as prime numbers , numbers whose factors besides 1 and itself are composite numbers, we can use the sieve of Eratosthenes to determine whether the number is prime or composite.

Learn more about prime numbers at brainly.com/question/145452

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2 years ago

2/3 times 1/2 = IN SIMPLEST FORM I GIIVE BRAINY

Zinaida [17]

Answer:

1/3!

Step-by-step explanation:

Look us Cymath on g0ogle, its a calculator that shows its work!

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3 years ago

There were 436 tickets purchased for a major league baseball game. The general admission tickets cost $6.50 and the upper reser

Nataly [62]

Answer:

How many general admission tickets were purchased? __136__

How many upper reserved tickets we purchased? _300_

Step-by-step explanation:

Let the number of general tickets = g.

Let the number of reserved tickets = r.

6.5g + 8r = 3284

g + r = 436

6.5g + 8r = 3284

(+) -8g + -8r = -3488

--------------------------------

-1.5g = -204

g = 136

g + r = 436

136 + r = 436

r = 300

Answer:

How many general admission tickets were purchased? __136__

How many upper reserved tickets we purchased? _300_

8 0

3 years ago

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