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3 years ago

Simpify the expression 7-x (-5x)-10 4x

1 answer:

8 0

Step 1. Gather like terms

 $7-(-5x*x)-10,4x
$

Step 2. Use Product Rule: $x^{a} x^{b} = x^{a+b}$

$7-(5 x^{2} )-10,4x$

Step 3. Simplify brackets

$7+5 x^{2} -10,4x$

Step 4. Simplify $7+5 x^{2} -10$ to $5x^{2} -3$

$5 x^{2} -3,4x$

7+5{x}^{2}-10

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A local lake has a fish population that follows a geometric series with these properties first time equals 48 ratio equals 1/4 d

kondaur [170]

Answer:

64.

Step-by-step explanation:

Sigma notation is ∑48(1/4)^(n-1).

Upper limit = a1 / (1 - r) where a1 = initial population and r = common ratio.

So it is 48 / (1 - 1/4)

= 48 / 3/4

= 48 * 4/3

= 64.

4 0

3 years ago

If a block of copper is 5 cm by 10 cm by 3 cm and has a mass of 1335 grams, what is the density of copper?

Maslowich

Answer:

the density of copper is 90.03g/cm³

Step-by-step explanation:

This problem bothers on the density of a substance, this case for a copper material

Given data

Mass of copper m = 1355g

Volume of copper block v= l*b*h

10*5*3=150cm³

We know that the density

ρ= mass/volume

ρ= 1355/150

ρ= 90.03g/cm²

The density of a substance is defined as the mass of the substance per unit volume

5 0

3 years ago

Read 2 more answers

Cornelius is at it again! He wrote a really confusing expression that needs to be simplified:

ziro4ka [17]

The answer is 3x2 + 8x + 8. (the 2 infront of 3x means squared I just could type it)

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3 years ago

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A construction company charges 15$ per hour for debris removal,plus aone-time free for the use of a trash dumpster.The fee hour

Mazyrski [523]

The total fee y for any number of hours x will be y = 15x + 60.

<h3>What is a linear equation?</h3>

A relationship between two or more parameters that, when shown on a graph, produces a linear model. The degree of the variable will be one.

The linear equation is given as,

y = mx + c

Where m is the slope of the line and c is the y-intercept of the line.

A construction company charges $15 per hour for debris removal, plus a one-time fee for the use of a trash dumpster.

Let c be the one-time fee for the trash dumpster and x be the number of hours.

Then the equation will be

y = 15x + c

The fee hour for 9 hours of service is $195.

Then the value of c will be

195 = 15 × 9 + c

195 = 135 + c

c = $60

The total fee y for any number of hours x will be y = 15x + 60.

More about the linear equation link is given below.

brainly.com/question/11897796

#SPJ1

7 0

2 years ago

The perimeter of the scalene triangle is 54.6 cm. Which equation can be used to find the value of b if side a measures 8.7 cm? 8

Mariana [72]

If you are trying to find the equation and you know your factors and your answer (8.7, 54.6, b) you can easily find the equation 8.7 + b= 54.6 I hope this helped! Have a nice day/night. :)

3 0

3 years ago