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3 years ago

Simplify the expression:5(4x-13)

Mathematics

2 answers:

katrin2010 [14]3 years ago

8 0

$5(4x-13)=5\cdot 4x-5\cdot 13=20x-65$

oksano4ka [1.4K]3 years ago

5 0

20x-65 -- basically just multiply each term inside the bracket by the term(s) outside the bracket.

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vitfil [10]

Answer:

$x = \frac{1}{e}$

Step-by-step explanation:

$f(x) = {(lnx)}^{2}$

$f1st(x) = \frac{2 lnx }{x} = 0$

$x < 1 \: \: f1 < 0 \: \: de creasing$

$f2nd(x) = \frac{2 - 2 lnx}{ {x}^{2} } = 0$

$x < e \: \: f2 > 0 \: \: concave \: up$

So x<1 is the condition which contains x=1/e

8 0

2 years ago

How many tacos could you buy with your money? If you had $20 dollars would you have enough money to buy a taco for 37 students o

8_murik_8 [283]

Answer:

You can buy 40 tacos

You have enough money

Step-by-step explanation:

Given

$Amount = \$20$

$Taco = 20$

$Unit\ Cost = \$0.50$ --- missing from the question

Required

Determine if you have enough amount

The number of Tacos that $20 can afford is calculated as:

$Tacos = \frac{Amount}{Unit\ Cost}$

So, we have:

$Tacos = \frac{20}{0.50}$

$Tacos = 40$

$40 > 37$ -- i.e. the number of Tacos will go round the 37 students

Hence, you have enough money

4 0

3 years ago

A guy wire for a suspension bridge runs from the ground diagonally to the top of the closest pylon to make a triangle. We can us

PolarNik [594]

Answer:

The guy wire lenght is 500 ft.

Step-by-step explanation:

The Pythagorean Theorem says the sum of the squares two adyacent sides is equal to the square of the opposite side.

Applied in this example, we can rephrase it as:

The sum of the square of the pylon height with the square of the distance from the guy wire tip to the pylon is Equal to the square of the Guy wire lenght.

So:

$PylonHeight^{2} + floordistance^{2} = GuyWireLength^{2} \\160.000 + 90.000 = GuyWireLength^{2} \\\\\sqrt{160.000 + 90.000} =GuyWireLength\\GuyWireLength= 500 ft$

4 0

4 years ago

I need help with #18

yan [13]

It is not equivalent because 3 (5x)= 15x while (3×5) (3×x)=15+3x they turn out different when you do the distributive property

6 0

3 years ago

Someone please Help me, I will give brainliest, pleaseee

kirill115 [55]

There’s no question ??

8 0

3 years ago

Read 2 more answers