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3 years ago

Combine like terms: -4k+15k-30=-78 (must be a decimal)

Mathematics

2 answers:

Verdich [7]3 years ago

6 0

Answer:

I don't know sorry, I wish I could help you

Digiron [165]3 years ago

4 0

<h3>hello!</h3>

Let's combine like terms:-

$\bigstar{\sf{-4k+15k-30=-78}$

Add the k's:-

$\bigstar{\sf{11k-30=-78}$

Add 30 to both sides:-

$\bigstar{\sf{11k=-78+30}$

$\bigstar{\sf{11k=-48}$

Divide both sides by 11:-

$\bigstar{\boxed{\sf{k=4.36}}$

Hope everything is clear; if you need any clarification/explanation, kindly let me know, and I will comment and/or edit my answer :)

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Please help thank you

nikdorinn [45]

Answer:

See explanation

Step-by-step explanation:

$(x^2+9x+10)(x-2)= \\\\x^3-2x^2+9x^2-18x+10x-20= \\\\x^3+7x^2-8x-20$

Jimmy is incorrect.

Using long division, you can find that the real answer.

First, subtract $x^2(x-2)$ from the original expression, leaving you with $9x^2+2x-40$ .

Next, subtract $9x(x-2)$ from the expression, leaving you with $20x-40$ . Finally, subtract $20(x-2)$ from the expression, leaving you with a remainder of 0. This means that the real quotient is $x^2+9x+20$ . Hope this helps!

6 0

3 years ago

Sixty students eat twenty four pizzas.To find how many pizzas are needed to feed fifteen students, Set up the problem but don't

bezimeni [28]

Idk what you mean the answer is 15 students eat six pizzas

4 0

4 years ago

A person wants to create a vegetable garden and keeps the rabbits out by enclosing it with 100 feet of fencing. The area of the

alekssr [168]

Answer:

The garden can not have area of 700ft^2

Step-by-step explanation:

We are given equation for area as

$A(w)=w\times (50-w)$

where

w is the width (in feet) of the garden

now, we are given area =700 ft^2

so, we can set area =700

and then we can solve for w

$w\times (50-w)=700$

$50w-w^2=700$

$-w^2+50w-700=0$

now, we can use quadratic formula

$ax^2+bx+c=0$

$w=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

we can compare and find a,b, and c

a=-1 , b=50 , c=-700

now, we can plug values

$w=\frac{-50\pm \sqrt{50^2-4\left(-1\right)\left(-700\right)}}{2\left(-1\right)}$

$w=25-5\sqrt{3}i,\:w=25+5\sqrt{3}i$

We can see that values of w is not real

so, w does not exists when area =700

so, The garden can not have area of 700ft^2

4 0

3 years ago

At Petco they have 3 hamsters for every 2 guinea pigs. Write this ratio in all 3 ways.

emmainna [20.7K]

Answer:

3:2 , 3/2, 3 to 2

Step-by-step explanation:

The best one is 3:2 cause it is the most used way to write a ratio. 3:2 also means 3 divided by 2 or 3 out of 2 so that's why you would use the other 2.

8 0

3 years ago

Read 2 more answers

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WITCHER [35]

Answer:

the first one is 4 and 5

Step-by-step explanation:

the second one is 45 because 15+15+15 is 45, you get 15 by the square root of 225

4 0

3 years ago

Read 2 more answers