MATHEMATICS MIDDLE SCHOOL

Finds the solutions to x^2=20

Answers

Answer 1

Answer:

Solution of an equation $x^(2) =20$ is $x= \pm 2√(5)$ .

What is solution of an equation?

The solution of an equation is the array of all values that, when replaced for unknowns, make an equation true.

Given

$x^(2) =20$

$x=√(20)$

$x=√(4 * 5 )$

$x=\sqrt{2^(2) * 5}$

$x= \pm 2√(5)$

Solution of an equation $x^(2) =20$ is $x= \pm 2√(5)$ .

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Answer 2

Answer:

Answer:

the solution of:

x²=20

√x² = √(2² × 5)

x=2√5

So the answer is

A. x= ±2√5

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The original price of a watch was $109.it was on sale for 100.28.what was the discount rate

Answers

$\$109-\$100.28=\$8.72\n\n(\$8.72)/(\$109)=(8.72)/(109)\cdot100\%=(872)/(109)\%=8\%\leftarrow answer$

How do you write 1.75 as a fraction

Answers

1.75 is One and three-fourths (1 and 3/4) or you can make it an improper fraction so it would be 7/4

the fraction would turn into a mixed number.
1.75 in a fraction is 1 75/100 simplifyed is 1 3/4

It took 20 minutes to print out a 250 page report.at this speed how many pages could this printer produce in 30 minutes

Answers

First lets look at the information we have. Lets do it:-

In 20 min 250 pgs print out.
in 30 mins ? pgs print out.

Now lets firn the unit rate to find out how many pgs are printed out in a min. Then we will multiply by the amount of mins (30) to the amount of pgs which can be printed in 1 min. Then the answer will be the amount of pgs which could be printed in 30 minutes at this rate. AND then we will check our work. Lets do it:-

Divide to find the unit rate:-
250 ÷ 20 = 12.5
So, in 1 min 12.5 pages can be printed OR 12 and a half.

Lets multiply to find out how many pages can be printed in 30 minutes.

12.5 × 30 = 375
So, in 30 min 375 pgs can be printed at this rate.

CHECK OUR WORK:-

375 ÷ 12.5 = 30
We were RIGHT!!!!

So, in 30 minutes 375 pages can be printed at this rate.

Hope I helped ya!!

20min_____250page
30min_____xpage
$x= (30*250)/(20) = (3*250)/(2) = 3*125=375$
Hope that helps.Have a nice day!!! ^^

Derrick's garden is 18 1/2 feet long. he plants bulbs 3/8 of a foot apart. how many bulbs can derrick plant in one row?\

Answers

He can plant 49 bulbs in one row.

I need help solving (5-6x9+6)x9+3-85 I came up with -109. Is that right

Answers

Multiply −6 by 9 to get −54.(5−54+6)⋅9+3−85Subtract 54 from 5 to get −49.(−49+6)⋅9+3−85Add −49 and 6 to get −43.−43⋅9+3−85Multiply −43 by 9 to get −387.−387+3−85
Add −387 and 3 to get −384.−384−85Subtract 85 from −384 to get −469.−469

thats what i did to get -469. show your work for finding -109 and we can compare

So we have
(5-6x9+6)x9+3-85

So this is a oder of operation question, firstly you start with the brackets

(5-6x9+6)

B. Brackets
E. Exponents
D. Division
M. Multiplication
A. Addition
S. Subtraction

(5-6x9+6)

Multiplication first

6x9=54

Now we have
(5-56+6)

56+6=62

62-5=57

((57))

Now we have left

57x9+3-85
Start from multiplication

57x9=513

513+3= 516

516-85= 413

413

Share £747 in the ratio 2:7