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2 years ago

Explain why x squared -8x+20 is always positive

Mathematics

1 answer:

Tpy6a [65]2 years ago

3 0

Answer:

to square a number you multiply the number by itself.

a positive number times a positive number is a positive number.

a negative number times a negative number is a negative number.

and if you are multiplying 2 numbers with the same sign they will always be a positive number.

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Can someone help will give brainliest

mafiozo [28]

Answer:

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3 years ago

A refrigerator can be bought on hire purchase by making a deposit of $500 and 18 monthly installments of $56 each. Calculate the

horsena [70]

500+ 18(56) equals total cost of refrigerator
$1508

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3 years ago

What is the value of x in the equation 8x – 2y = 48, when y = 4?

Phoenix [80]

Hey there!

So, if $y=(4)$ , this would mean that we would do $(2 \ * \ 4)$ and from this, we would get 8.

We will then need to find what is $(x)$ .

$(x) = 7$

$8*7$ = $\boxed{56}$

So, the equation would really look like . . .

$\left[\begin{array}{ccc} 8*(7)-2*4 = 48 \\ \\ x=\boxed{7}\end{array}\right]$

Hope this helps.
~Jurgen

8 0

3 years ago

A salesperson's weekly paycheck is 40% more than a second salesperson's paycheck. The two paychecks total $1075. Find the amount

BlackZzzverrR [31]

X is gonna be the normal paycheck

0.45x+x=1075

= 0.40x+x=1075

= 1.4x=1075

x= 1075/1.4

x=767.85 the normal paycheck price

1075.00-767.85= 307.15

so a saleperson weekly paycheck is 307.15 dollars more

hope this helps

3 0

3 years ago

Please help me this is so confusing to me.

Naddik [55]

Hi there! :)

$\large\boxed{A = 120^{o}}$

Find the central angle using a ratio in regards to angle and circumference.

The radius is 27 units, so use the following equation to calculate circumference:

C = 2rπ

Therefore:

C = 2(27)π = 54π

Since we have the total circumference, we can write the following proportion:

$\frac{x}{360} = \frac{18\pi}{54\pi}$

Cross multiply:

54πx = 6480π

Divide both sides by 54π to isolate for x:

x = 120°

8 0

2 years ago