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3 years ago

Combine like terms to simplify the expression: 9 + 3b − 1 + 7b − 2 = ______

Mathematics

1 answer:

Novosadov [1.4K]3 years ago

6 0

Answer:

6 + 10b.

Step-by-step explanation:

We begin with: 9 + 3b -1 + 7b - 2 =

Combining like terms produces:

9 - 1 -2 + 3b + 7b -->

6 + 10b.

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What’s the answer??? (SOMEONE PLEASE HELP)

Olin [163]

3(2x^2 + 4) - 4(x - 6)
= 6x^2 + 12 - 4x + 24
= 6x^2 - 4x + 36
therefore first answer is correct

5 0

3 years ago

Si 2x + y = 7, ¿cuál es el valor de y<br> cuando x = 3?

Gala2k [10]

Answer:

y= 1

Step-by-step explanation:

primero tienes que subtituir 3 en la x 2×3+y=7

6+y=7

-6. -6

y=1

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3 years ago

If the sum of the interior angles of a regular polygon measures up to 1440 degrees, how many sides does the polygon have?

Nadusha1986 [10]

Answer:

Option 1) 10 sides

Step-by-step explanation:

We are given a regular polygon. The sum of interior angles measure upto 1440 degrees.

Since it is a regular polygon, it satisfies the following properties:

All the sides are equal.
All interior angle have same measure.

Let the regular polygon have n sides.

Then, the sum of interior angle is given by:

$(n-2)\times 180^\circ$

Putting the values, we get,

$(n-2)\times 180 = 1440\\\\n-2 = \dfrac{1440}{180}\\\\n-2 = 8\\n = 8 + 2\\n =10$

Thus, there are 10 sides. The regular polygon is a regular decagon.

6 0

3 years ago

A car lot owner is trying to get rid of this year's inventory to make room for the new vehicles. He paid $25,599 for a red truck

Paha777 [63]

Answer:

Step-by-step explanation:

Step one

given data

Cost price of vehicle= $25,599

Selling price of vehicle= $22,000

Required

The percentage discount in the price

Step two:

% discount= cost price-selling price/cost price*100

% discount= 25,599-22,000/25,599*100

% discount= 3599/25,599*100

% discount= 0.140*100

% discount= 14%

The mark down percentage use is 14%

5 0

3 years ago

One angle of a right triangle measures 60°. The side opposite this angle measures 15 inches.

Delicious77 [7]

Step-by-step explanation:

To solve this question I would use the sin rule.

The sin rule states that

$\frac{a}{ \sin(a) } = \frac{b}{ \sin(b) }$

Therefore if you substitute in your numbers you get:

$\frac{a}{ \sin(90) } = \frac{15}{ \sin(60) }$

If you rearrange that you get:

$a = \frac{15}{ \sin(60) } \times \sin(90)$

Therefore a = 17.3 Inches (to 3 sf)

This can also be done with basic trigonometry where you would get

$\sin(60) = \frac{15}{h}$

Rearranging to

$h = \frac{15}{ \sin(60) }$

meaning the answer is 13.7 inches

6 0

4 years ago

Read 2 more answers