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2 years ago

If four times a number plus 3 is 11, what is the number

2 answers:

7 0

Four times a number plus 3 is 11

$4 * n + 3 = 11$

$4n + 3 = 11 -3$

$4n = 8$

$4n/4=8 / 4$

$n = 2$

Hence solved

mihalych1998 [28]2 years ago

4 0

N - the number

4 · n + 3 = 11
4n + 3 = 11 |subtract 3 from both sides
4n = 8 |divide both sides by 4

n = 2

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2 years ago

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. Which ordered pairs in the form (x, y) are solutions to the equation 7x – 5y = 28?

Brut [27]

we know that

If a ordered pair (x,y) is a solution of the equation, then the ordered pair must satisfy the equation

we have the equation

$7x-5y=28$

Let's verify all the cases to determine the solution to the problem.

case A) point $(-6,-14)$

Substitute the values of x and y in the equation

$x=-6\\y=-14$

$7(-6)-5(-14)=28$

$-42+70=28$

$28=28$ -------> is true

therefore

The point $(-6,-14)$ is a solution of the equation

case B) point $(-1,-7)$

Substitute the values of x and y in the equation

$x=-1\\y=-7$

$7(-1)-5(-7)=28$

$-7+35=28$

$28=28$ -------> is true

therefore

The point $(-1,-7)$ is a solution of the equation

case C) point $(4,10)$

Substitute the values of x and y in the equation

$x=4\\y=10$

$7(4)-5(10)=28$

$28-50=28$

$-22=28$ -------> is not true

therefore

The point $(4,10)$ is not a solution of the equation

case D) point $(7,9)$

Substitute the values of x and y in the equation

$x=7\\y=9$

$7(7)-5(9)=28$

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$4=28$ -------> is not true

therefore

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therefore

the answer is

$(-6,-14)$

$(-1,-7)$

8 0

2 years ago

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Step-by-step explanation:

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In this question I = $6400, P = $3200 and i = 8.25%, so we plug in those numbers to get t = 6400 / (0.0825 * 3200), which solves to 24.2424 years.

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