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3 years ago

Apr 13, 11:50:23

Mathematics

1 answer:

PolarNik [594]3 years ago

7 0

Answer:

16.50 + 10.50p ≤ 90

Step-by-step explanation:

add the parking amount and the ticket cause per person (p) to make it less than or equal to $90 since that’s the only amount of money that could be used

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Solve the equation for the y-value and choose whether it is a direct variation or inverse variation.

Leona [35]

$\\ \sf\longmapsto xy=7$

Take x to right and divide

$\\ \sf\longmapsto y=\dfrac{7}{x}$

Hence

. $\\ \sf\longmapsto y\propto \dfrac{1}{x}$

Inverse variation

7 0

2 years ago

Use properties of addition and subtraction to evaluate the expression. −28−47−12

Brrunno [24]

The answer would be -87

6 0

3 years ago

What is the factored form of the expression? d^2 = 36d + 324

Veseljchak [2.6K]

Answer:

$(x-43.45)(x+7.45)=0$

Step-by-step explanation:

We have the quadratic equation $d^{2}=36d+324$ i.e. $d^{2}-36d-324=0$

As, the roots of the quadratic equation $ax^{2}+bx+c=0$ are given by $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ .

So, from the given equation, we have,

a = 1, b = -36 , c = -324.

Substituting the values in $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ , we get,

$x=\frac{36\pm \sqrt{(-36)^{2}-4\times 1\times (-324)}}{2\times 1}$

i.e. $x=\frac{36\pm \sqrt{1296+1296}}{2}$

i.e. $x=\frac{36\pm \sqrt{2592}}{2}$

i.e. $x=\frac{36\pm 50.9}{2}$

i.e. $x=\frac{36+50.9}{2}$ and $x=\frac{36-50.9}{2}$

i.e. $x=\frac{86.9}{2}$ and $x=\frac{-14.9}{2}$

i.e. x = 43.45 and x = -7.45

Thus, the roots of the equation are 43.45 and -7.45.

Hence, the factored form of the given expression will be $(x-43.45)(x+7.45)=0$

3 0

3 years ago

13 = -7 + 9x - 5x X =

brilliants [131]

Answer:

x = 5

Step-by-step explanation:

Given

13 = - 7 + 9x - 5x , that is

13 = - 7 + 4x ( add 7 to both sides )

20 = 4x ( divide both sides by 4 )

5 = x

3 0

3 years ago

| 5t-1 |=6 Show all work

kipiarov [429]

Answer:

t = 1.4

Step-by-step explanation:

If you multiply 5 and 1.4 together, you get 7. Then, you do 7 - 1, and you get 6.

The inverse operation symbol things don't matter if the answer you get inside the two vertical bars is positive.

5 0

3 years ago

Read 2 more answers