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3 years ago

Which of these can be considered “online banking?”

Mathematics

2 answers:

Lera25 [3.4K]3 years ago

5 0

Answer:

I think that its b. ll and lll

Step-by-step explanation:

I have no idea how to explain this. It just makes the most sense to me?

Masteriza [31]3 years ago

4 0

Answer:

All

Step-by-step explanation:

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You use your mobile phone to phone home every day. It cost £15 per moth and £0.18 per minute for phone calls. how much will you

suter [353]

0.18x420= 75.6+15.00=90.6

7 0

3 years ago

Johanna has to solve the system of equations using substitution. She isolates x in the second equation. Which should be her next

olganol [36]

Answer: A) 3(10 - 5y) + 6y =12

Step-by-step explanation:

As per the question , the given system of linear equation :

$3x+6y=12---(i)\\\\ x+5y=10---(ii)$

Here , To solve the system of equations using substitution , Johanna isolates x in the second equation and writes

$x=10-5y$

As per the substitution method , the next step is to substitute the isolated value of 'x' in first equation , thus the next step will become

$3(10-5y)+6y=12$

Hence, the correct option is A) 3(10 - 5y) + 6y =12

6 0

3 years ago

I need help fast please!!

kaheart [24]

Solution set is: ( $7,\frac{13}{3}$ )

Option B is correct

Step-by-step explanation:

We need to find the solution to system of equations

$y=\frac{1}{3}x+2\\y=\frac{4}{3}x-5$

Let:

$y=\frac{1}{3}x+2\,\,\,eq(1)\\y=\frac{4}{3}x-5\,\,\,eq(2)$

Putting value of y from eq(2) into eq(1)

$\frac{4}{3}x-5=\frac{1}{3}x+2\\Combining\,\,like\,\,terms:\\\frac{4}{3}x-\frac{1}{3}x=2+5\\Taking\,\,LCM\\\frac{4x-1x}{3}=7\\\frac{3x}{3}=7\\x=7$

So, value of x=7

Putting value of x into equation 1 to find the value of y:

$y=\frac{1}{3}x+2\\y=\frac{1}{3}(7)+2\\y=\frac{7}{3}+2\\Taking\,\,LCM\\y=\frac{7+2*3}{3}\\y=\frac{7+6}{3}\\y=\frac{13}{3}$

So, value of y = $\frac{13}{3}$

Solution set is: ( $7,\frac{13}{3}$ )

Option B is correct

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

3 0

3 years ago

ok i really need help with this... liz had 7/8 of a puzzle finished. What percent did she have finished?

ivolga24 [154]

Answer: 87.5%
Have a good day :D

7 0

3 years ago

Match the phenomenal expression on the left with the simplified version on the right

nalin [4]

Given the polynomial expression:

(y + 5)²

(y - 5)(y + 5)

Let's simplify each of the given expression:

a.) (y + 5)²

The given equation is a factor of a perfect square trinomial. For this type of expression, the following is the formula for expanding it.

$\text{ (a+b)}^2\text{ = }a^2\text{ + 2ab + }b^2$

We get,

$\mleft(y+5\mright)^2=(y)^2+2(y)(5)+(5)^2$ $(y+5)^2=y^2+10y+25$

b.) (y - 5)(y + 5)

To be able to simplify the following expression. We will be using the formula for the difference of two squares.

$(a+b)(a-b)=a^2-b^2$

We get,

$\mleft(y-5\mright)\mleft(y+5\mright)=(y)^2-(5)^2$ $(y-5)(y+5)=y^2-25^{}$

8 0

1 year ago