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3 years ago

I need help on #20 please

Mathematics

1 answer:

olganol [36]3 years ago

8 0

Answer:

P = 10x³ + 4x² + 8x + 6

Step-by-step explanation:

The perimeter of a rectangle is twice the sum of length and width.

P = 2(L+W) = 2((x³ +2x² -6x +12) +(4x³ +10x -9))

= 2(5x³ +2x² +4x +3) . . . . collect terms inside parentheses

P = 10x³ +4x² +8x +6

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30 pointss!HELP! Two students get into an argument about the correct answer.

Mamont248 [21]

Both Rhianna and Christopher were correct as they took different reference angles.

Step-by-step explanation:

Step 1:

$tan \theta = \frac{opposite side}{adjacentside} .$

The value of the tan of a reference angle is calculated using the above formula.

The hypotenuse is the longest side of the triangle is always opposite the right angle of the triangle.

In this triangle, the hypotenuse is the side measuring 5 units.

Step 2:

When the reference angle is A, the opposite side measures 3 units and the adjacent side measures 4 units.

So $tan A = \frac{3}{4} .$

When the reference angle is C, the opposite side measures 4 units and the adjacent side measures 3 units.

So $tan C = \frac{4}{3} .$

So both Rhianna and Christopher were right as they took different reference angles i.e. A and C.

7 0

3 years ago

A blank is a unit rate with a denominator of 1 unit

Dima020 [189]

It is 3. That's the correct answer

6 0

3 years ago

Trimble Graphic Design receives $2,250 from a client billed in a previous month for services provided. Which of the following ge

krok68 [10]

Answer:

Dr Cash/Bank $2,250

Cr Account Receivable $2,250

Step-by-step explanation:

At the time the transaction was carried out, that is the previous month, the accounting entries was a debit to account receivable (client account) and a credit to sales account. which is as shown below:

Dr Account Receivable $2,250

Cr Sales $2,250

Being sales on credit to a client.

The client account will have an outstanding debit balance of $2,250 until payment is made. once payment is made, the following entries will be made to ensure no outstanding balance in the client account.

Dr Cash/Bank $2,250

Cr Account Receivable $2,250.

7 0

3 years ago

Is 7/8 greater than or less than 2/5

belka [17]

Answer:

7/8 > 2/5

Step-by-step explanation:

7/8 is greater than 2/5.

5 0

3 years ago

The sum of the measures of the angles of a triangle is 180. The sum of the measures of the second and third angles is four times

prohojiy [21]

Answer:

{36, 66, 78}

Step-by-step explanation:

Let the measures of the three angles be f, s and t, for first, second and third. Then s + t = 4f, t = 12 + s, and f + s + t = 180.

Subbing 12 + s for t in the first equation, we get s + 12 + s = 4f.

Subbing the same in the third equation, we get f + s + 12 + s = 180

This results in two equations in two unknowns (f and s):

2s - 4f = -12

2s + f = 168.

Let's eliminate s by subtracting the first of these two equations from the second. Doing so yields 5f = 180. Then the first angle, f, or x, is 36.

Then, from 2s + f = 168, we get 2s + 36 = 168, or 2s = 132. Thus, the second angle is s = y = 66.

The sum of the three angles must be 180. Thus, 36 + 66 + t = 180, or

102 + t = 180, or t = z = 78.

The three angles are

{36, 66, 78}.

3 0

3 years ago