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3 years ago

??help what is DEB?

Mathematics

1 answer:

sergij07 [2.7K]3 years ago

6 0

Answer:

85°

Step-by-step explanation:

AED and DEB would add up to 180, the same goes for AEC and CEB

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A pair of sneakers is on sale for $60. This is 80% of the original price. What 2

Leto [7]

Answer:

$75

Step-by-step explanation:

let the original price be x

then,

80% of x = 60

80/100 of x = 60

therefore x = 75

3 0

2 years ago

Write a quadratic equation given the roots -1/3 and 5, show your work

Travka [436]

$\boxed{(x - a)(x - b) = 0}$

The equation above is the intercept form. Both a-term and b-term are the roots of equation.

$x = - \frac{1}{3} \\ x = 5$

These are the roots of equation. Therefore we substitute a = - 1/3 and b = 5 in the equation.

$(x + \frac{1}{3} )(x - 5) = 0$

Here we can convert the expression x+1/3 to this.

$x + \frac{1}{3} = 0 \\ 3x + 1 = 0$

Rewrite the equation.

$(3x + 1)(x - 5) = 0$

Simplify by multiplying both expressions.

$3 {x}^{2} - 15x + x - 5 = 0 \\ 3 {x}^{2} - 14x - 5 = 0$

Answer Check

Substitute the given roots in the equation.

$3 {(5)}^{2} - 14(5) - 5 = 0 \\ 75 - 70 - 5 = 0 \\ 75 - 75 = 0 \\ 0 = 0$

$3( - \frac{1}{3} )^{2} - 14( - \frac{1}{3}) - 5 = 0 \\ 3( \frac{1}{9} ) + \frac{14}{3} - 5 = 0 \\ \frac{1}{3} + \frac{14}{3} - \frac{15}{3} = 0 \\ \frac{15}{3} - \frac{15}{3} = 0 \\ 0 = 0$

The equation is true for both roots.

Answer

$\large \boxed {3 {x}^{2} - 14x - 5 = 0}$

8 0

2 years ago

Mrs. Smith decides to buy three sweaters and a pair of jeans. she had $120 in her wallet. if the price of jeans is $35, what is

mylen [45]

Answer:

The highest possible price of a sweater is $28.33

Step-by-step explanation:

We already know that price $j$ of jeans is $35.Let's say Mrs.Smith buys 3 sweaters for $p$ dollars each, and since her budget is $120 we have the inequality:

$3p+j\leq 120\\ \\\\=3p+35\leq 120$

Therefore

$p\leq 28.33$

Thus the maximum price of a sweater is $28.33

5 0

3 years ago

Read 2 more answers

Two trains, Train A and Train B, simultaneously depart Station A and Station B. Station A and Station B are 252.5 miles apart fr

omeli [17]

-- The trains start moving at the same time.

-- The space between them is initially 252.5 miles.

-- They reduce the distance between them at the rate of (124.7+253.5)=378.2mph.

-- It will take them (252.5 / 378.2) = 0.6676 hour to meet.

That's 40min 3.49sec .

-- After tooting and puffing toward each other for 8 minutes, they still have 32min 3.49sec to go before they meet each other. We're all hoping that they're on different tracks.

4 0

3 years ago

It says solve for x and round to the nearest hundredth. 1. 9 over 6 equals x over 10

emmainna [20.7K]

Answer:

1.110

Step-by-step explanation:

I hope that help's

5 0

3 years ago