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Kay [80]
3 years ago
6

Factorise: a squared +8a -20

Mathematics
1 answer:
Vaselesa [24]3 years ago
8 0
Factor out the 4 in both equations
8a^2-20^2=(2^2 times a^2 times 2)-(2^2 times 5)
therefor it is also equal to
(2a)^2 times 2-(2^2 times 5)
we can force it into a difference of 2 perfect squares which is a^2-b^2=(a-b)(a+b)
(2a√2)^2-(2√5)^2=((2a√2)-(2√5))((2a√2)+(2√5))


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What is sales tax and explain how we use it in everyday life.<br> 1-5 sentences plz
bonufazy [111]

Answer: Look below. I hope this helps=3

Step-by-step explanation: Sales tax is an additional amount of money you pay. based on a percentage of the selling price of goods. Also services that are purchased. For example, if you purchase a new television for $400 and live in an area where the sales tax is 7%. Then you would pay $28 in sales tax.

7 0
3 years ago
If f(x) = |x| + 9 and g(x) = -6, which describes the range of (f+g)(x)
kumpel [21]

The range exist on all real values. This can be written as (-infty, infty)

<h3>Range of a function</h3>

The range is the value of the dependent variable for which it exists. Given the following functions

f(x) = |x| + 9 and;

g(x) = -6

Determine the sum

(f+g)(x) =  |x| + 9 + (-6)

(f+g)(x) = |x| + 9 -6

(f+g)(x) = |x| + 3

Determine the range of the function

The range exist on all real values. This can be written as (-infty, infty)

Learn more on range here: brainly.com/question/1466393

#SPJ1

7 0
2 years ago
Sam has purchased a $30,000 car for his business. The car depreciates 30% each year. I know the sequence is arithmetic, I know t
Naddik [55]
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5 0
3 years ago
Varies inversely as If x = 6 then y = 8. Find y when x = 4 .<br> Y=
icang [17]

Answer:

Explanation:

The statement is expressed as

y

∝

1

x

inverse means

1

variable

To convert to an equation introduce k, the constant of variation.

y

=

k

×

1

x

⇒

y

=

k

x

To find k use the given condition that y = 8 when x = 4

8

=

k

4

⇒

k

=

4

×

8

=

32

⇒

equation is

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

∣

∣

∣

2

2

y

=

32

x

2

2

∣

∣

∣

−−−−−−−−−−−−

x

=

16

→

y

=

32

16

⇒

y

=

2

when

x

=

16

8 0
3 years ago
A tv is being sold for$255 .It was originallu $300 . What is the percent discount?
satela [25.4K]
255 course people have more money to buy other stuff now their 55$ left
8 0
4 years ago
Read 2 more answers
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