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3 years ago

9

Can someone help me with both of these? You can answer only one, however, If you answer both that is who gets brainliest. don't

answer just to take my points or you will get reported.

2 answers:

denis-greek [22]3 years ago

8 0

Answer:

20x+80

10/21

Step-by-step explanation:

20*x+20*4

20x+80

$\frac{5}{7}*\frac{2}{3}$

5*2=10

7*3=21

$\frac{10}{21}$

damaskus [11]3 years ago

3 0

Answer:

20x+80

10/21

Step-by-step explanation:

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seropon [69]

The total deposit is $481.10

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4 years ago

Which of the following expressions are equivalent to −5.93+(−8.62)+5.93?

vampirchik [111]

Answer:

A, B, C, D

Step-by-step explanation:

−5.93 + (−8.62) + 5.93 =
−5.93 - (8.62 - 5.93) = B
−(5.93 + 8.62) + 5.93 = C
−5.93 −8.62 - (- 5.93) = D
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3 years ago

Read 2 more answers

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viva [34]

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5 0

4 years ago

A second number is 6 less than a first number. A third number is twice the first number. If the sum of three number is 306, find

Serga [27]

Answer:

first number = 78

second number = 72

third number = 156

Step-by-step explanation:

first number = a

second number = b

third number = c

we have

b=a-6 equation 1

c=2a equation 2

a+b+c=306 equation 3

using equation 1 and equation 2 in equation 3 we have

a+a-6+2a=306

4a=306+6

4a=312

a=312/4

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3 0

4 years ago

Here are two expressions whose product is a new expression, :

Vera_Pavlovna [14]

Answer:

1. Fill in the box with 1

2. Fill in the box with -2

Step-by-step explanation:

Expression:

$(-2x^3 + [\ ]x)(x^{[\ ]}+1.5) = A$

Solving (1): Fill in the box to make it a polynomial.

To make it a polynomial, we simply fill in the box with a positive integer (say 1)

Fill in the box with 1

$(-2x^3 + [1]x)(x^{[1]}+1.5) = A$

Remove the square brackets

$(-2x^3 + x)(x^1+1.5) = A$

$(-2x^3 + x)(x+1.5) = A$

Open bracket

$-2x^4 - 3x^3 + x^2 + 1.5x = A$

Reorder

$A = -2x^4 - 3x^3 + x^2 + 1.5x$

The above expression is a polynomial.

This will work for any positive integer filled in the box

Solving (2): Fill in the box to make it not a polynomial.

The powers of a polynomial are greater than or equal to 0.

So, when the boxes are filled with a negative integer (say -2), the expression will cease to be a polynomial

Fill in the box with -2

$(-2x^3 + [-2]x)(x^{[-2]}+1.5) = A$

Remove the square brackets

$(-2x^3 - 2x)(x^{-2}+1.5) = A$

Reorder

$A = (-2x^3 - 2x)(x^{-2}+1.5)$

Open brackets

$A = -2x-3x^3-2x^{-1}-3x$

Collect Like Terms

$A = -3x^3-2x-3x-2x^{-1}$

$A = -3x^3-5x-2x^{-1}$

Notice that the least power of x is -1.

Hence, this is not a polynomial.

3 0

3 years ago