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2 years ago

Emily spent $4.5 on clothes and had $15 left with her. how much money did Emily have in the beginning?

Mathematics

2 answers:

AleksandrR [38]2 years ago

8 0

Answer:

$19.5

Step-by-step explanation:

Total money with Emily in beginning = 4.5 + 15 = $ 19.5

krok68 [10]2 years ago

7 0

Answer:19.50

Step-by-step explanation:

If she has $15 Left you need to add the 4.50 she spent to that to find the answer.

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What is..<br> y=x+3 and y=-1/2x-3

PtichkaEL [24]

Answer: (-4, -1)

Step-by-step explanation:

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2 years ago

The area of a parallelogram that has a base of 30 feet and a height of 20 feet.

Morgarella [4.7K]

area of parallelogram=base x height

= 30 x 20

= 600feet

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2 years ago

5+1+(-3)+...+(-395)=

sleet_krkn [62]

$= \frac{(-395+5)(-395-5-4)}{2.(-4)} \\ \\ \\=-19695 \\ \\ \\ Good Luck:))$

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3 years ago

Sean tossed a coin off a bridge into the stream below. The path of the coin can be represented by the equation 2 h tt = − 16t^2+

tekilochka [14]

Answer:

It will take 5.61 seconds for the coin to reach the stream.

Step-by-step explanation:

The height of the coin, after t seconds, is given by the following equation:

$h(t) = -16t^{2} + 72t + 100$

How long will it take the coin to reach the stream?

The stream is the ground level.

So the coin reaches the stream when h(t) = 0.

$h(t) = -16t^{2} + 72t + 100$

$-16t^{2} + 72t + 100 = 0$

Multiplying by (-1)

$16t^{2} - 72t - 100 = 0$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

$16t^{2} - 72t - 100 = 0$

$a = 16, b = -72, c = -100$

$\bigtriangleup = (-72)^{2} - 4*16*(-100) = 11584$

$t_{1} = \frac{-(-72) + \sqrt{11584}}{2*16} = 5.61$

$t_{2} = \frac{-(-72) - \sqrt{11584}}{2*16} = -1.11$

Time is a positive measure, so we take the positive value.

It will take 5.61 seconds for the coin to reach the stream.

3 0

3 years ago

Determine the range of the function $f(x) = -4x^2-8x-6$. Enter your answer in interval notation.

saveliy_v [14]

Answer:[tex]y=-4x^2 -8x-6

Step-by-step explanation:

6 0

3 years ago