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2 years ago

(6h+2)+(-7h-8) simplify?

Mathematics

1 answer:

lawyer [7]2 years ago

4 0

Answer:

-h - 6

Step-by-step explanation:

(6h + 2) + (-7h - 8) <== remove parenthesis

6h + 2 - 7h - 8 <== combine like terms

6h - 7h + 2 - 8

-h - 6

Hope this helps!

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What numbers add to 32 and multiply to -80??

VARVARA [1.3K]

X+y=32
xy=-80

x+y=32
minus x both sides
y=32-x
sub for y

x(32-x)=-80
32x-x^2=-80
times both sides by -1
x^2-32x=80
minus 80 both sides
x^2-32x-80=0
use quadratic formula
where
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^2-4ac} }{2a}$

a=1
b=-32
c=-80

x= $\frac{-(-32)+/- \sqrt{(-32)^2-4(1)(-80)} }{2(1)}$
x= $\frac{32+/- \sqrt{1024+320} }{2}$
x= $\frac{32+/- \sqrt{1344} }{2}$
x= $\frac{32+/- 8\sqrt{21} }{2}$
x=16+/-4√21

the numbers are
16+4√21 and 16-4√21

5 0

3 years ago

3x+9+8x-6+7x-2=73 what is the value of x

Aliun [14]

Answer:

x=4

Step-by-step explanation:

First you add the values with x and theese without x:

(3x+8x+7x)+(9-6-2)=73

18x+1=73

Then you subtract (-1) from both sides:

18x=72

And then you divide by 18:

x=72:18=4

8 0

4 years ago

Multiplying a trinomial by a trinomial follows the same steps as multiplying a binomial by a trinomial. Determine the degree and

Veseljchak [2.6K]

Degree = 4

Maximum possible number of terms for = 5

Solution:

Given expression:

$\left(x^{2}+x+2\right)\left(x^{2}-2 x+3\right)$

To multiply the trinomial by a trinomial:

$\left(x^{2}+x+2\right)\left(x^{2}-2 x+3\right)$

Multiply each of the first term by the each of the second term.

$=x^{2}(x^{2}-2 x+3)+x(x^{2}-2 x+3)+2(x^{2}-2 x+3)$

$=(x^{4}-2 x^3+3x^2)+(x^{3}-2 x^2+3x)+(2x^{2}-4 x+6)$

Remove the brackets and arrange the terms with same powers together.

$=x^{4}-2 x^3+x^{3}+3x^2-2 x^2+2x^{2}+3x-4 x+6$

$=x^{4}- x^3+3x^2- x+6$

The product of the trinomials is $x^{4}- x^3+3x^2- x+6$ .

Degree is the highest power of the variable.

Degree = 4

Maximum possible number of terms for = 5

3 0

3 years ago

Read 2 more answers

6 workers can build a wall in 30 days. If after 6 days 3 more workers join, find the number of days to build the same wall?

viktelen [127]

The wall can be built in 22 days by 6 workers in first 6 days and 9 workers in the rest of time.

<h3>How to use inverse proportionality to determine building time of a wall</h3>

In this question we must use the definition of <em>inverse</em> proportionality, in which the number of workers ( $n$ ), no unit, is inversely proportional to the <em>building</em> time ( $t$ ), in days.

According to the statement, 6 workers spent 6 days building a wall and there are 24 days left for completion, but 3 more workers entered to reduce building time, which can be represented by the following expression:

$x = 24\,days \times \frac{6}{9}$

$x = 16\,days$

In this scenario, the wall can be built in 22 days. $\blacksquare$

To learn more on inverse proportionality, we kindly invite to check this verified question: brainly.com/question/4838941

4 0

3 years ago

15n^2-27n-6 factoring trinomials

Blababa [14]

You start by taking out the GCF of 3

8 0

3 years ago