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2 years ago

Wich pair of equations below represents perpendicular lines? Please!!!

Mathematics

2 answers:

bulgar [2K]2 years ago

7 0

B) y = 5x + 15 and y = -5x + 15 I think.

sp2606 [1]2 years ago

3 0

Answer:

It is A

Step-by-step explanation:

it is the negative recipricol

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Anton bought a picnic cooler. His total bill, with tax, was $7.95. He paid 6 percent sales tax. How much did he pay for the cool

Rus_ich [418]

7.95 ÷ 1.06 = $7.50

This works as by dividing 7.95 by the percentage multiplier 1.06 it will give you the original amount.

An alternative method is to find out what 100% (7.95) is, then divide by 10 to find 10% and then divide by 10 again to find 1% and then multiply the 1% by 6 and subtracting the answer from 7.95.

7 0

2 years ago

Determine the equivalent system for the given system of equations.

balandron [24]

Answer:

Step-by-step explanation:

4x-5y=2 ...(1)

10x-21y=10 ...(2)

(1)+2(2) gives

24x-47y=22

6 0

2 years ago

Jo is 5cm taller than Kathy.Let j=jo height.Then? =kathys height.

xxMikexx [17]

Answer:

Kathy = J - 5 cm

Step-by-step explanation:

Jo = 5 + Kathy

Jo = J

Kathy = K

=> J = 5 + K

=> J - 5 = 5 - 5 + K

=> J - 5 = K

=> K = J - 5

So, Kathy's height is J - 5 cm

8 0

2 years ago

Find the value of x needed to make the equation True. 3/4(20x-8)-3=54

olasank [31]

Answer:

The answer is option B, x = 4.2

6 0

2 years ago

What is the term of a 7-term geometric series if the first term is -11 the last term is -45,056 and the common ratio is -4

shutvik [7]

I assume you mean to ask how to find the sum of the seven terms?

You have

$a_2=ra_1$
$a_3=ra_2=r^2a_1$
$a_4=ra_3=r^3a_1$
...
$a_7=ra_6=r^6a_1$

So the sum is

$a_1+ra_1+r^2a_1+\cdots+r^6a_1=a_1(1+r+r^2+\cdots+r^6)=a_1\times\dfrac{1-r^7}{1-r}$

You know that $a_1=-11$ and $r=-4$ , so the sum is equal to

$-4\times\dfrac{1-(-4)^7}{1-(-4)}=-13108$

8 0

2 years ago