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3 years ago

Add (7x2 – 3x) + (5x-6). A. 7x2 + 2x-6 B. 4x² - x c. 7x2 - 2x- 6 D. 7x2 + 8x- 6

Mathematics

1 answer:

MrMuchimi3 years ago

3 0

(7x^2 – 3x) + (5x-6)

7x^2 - 3x + 5x - 6

7x^2 + 2x - 6

Answer: Choice A

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Your rectangular garden is 15 1/2 feet long and 26.5 feet wide. You plan to build a border. The border material costs $2.88 for

Elanso [62]

Answer:

$ 903.84

Step-by-step explanation: First find the perimeter, width + length + width + length. Then multiply it by 3 as the border is 3 bricks tall, divide it by 1.5 then multiply by 2.88 to get the price of the border. Add $420 to get the final price.

3 0

3 years ago

What is the measure of angle R?

tigry1 [53]

Option B:

25 degrees

Solution:

Given data in triangle PQR,

The side opposite to angle P is p.

The side opposite to angle Q is q.

The side opposite to angle R is r.

q = 36, r = 20, angle Q = 50°.

To find the measure of angle R:

Using law of sine,

$$\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}$

$$\Rightarrow\frac{p}{\sin P}=\frac{q}{\sin Q}=\frac{r}{\sin R}$

Take only two sides.

$$\Rightarrow\frac{q}{\sin Q}=\frac{r}{\sin R}$

Substitute the given values.

$$\Rightarrow\frac{36}{\sin 50^\circ}=\frac{20}{\sin R}$

Do cross multiplication.

$\Rightarrow36\times\sin R = \sin50^\circ\times20$

sin 50° = 0.766

$\Rightarrow36\times\sin R = 0.766\times20$

$\Rightarrow36\times\sin R = 15.32$

$$\Rightarrow\sin R = \frac{15.32}{36}$

$$\Rightarrow\sin R = 0.4255$

$$\Rightarrow R = \sin^{-1}(0.4255)$

⇒ R = 25.18°

⇒ R = 25° (approximately)

Option B is the correct answer.

Hence the measure of angle R is 25 degrees.

3 0

3 years ago

What is a monthly finance charge if the average daily balance is $30, the daily periodic rate is 0.07% and the number of days in

Sloan [31]

B. 63 Cents is the correct answer.

5 0

3 years ago

Read 2 more answers

Match the equation with the step needed to solve it.

Harman [31]

1 subtract 1 2m - 1 = 3m
2 subtract 2 2m = 1 + m 
3 subtract m m - 1 = 2 
4 add 2 + m = 3 
5 subtract 2m -2 + m = 1 
6 add 1 3 = 1 + m
1.5.
2.4
3.1
42
56
63

3 0

3 years ago

Given the definitions of f (x) and g(x) below, find the value of (g • f)(9).

Stells [14]

9514 1404 393

Answer:

(g·f)(9) = 496

Step-by-step explanation:

One way to do this is to find the values of g(9) and f(9).

g(9) = (3x -1)x +14 = (3(9) -1)(9) +14 = 26(9) +14 = 248

f(9) = -(9) +11 = 2

Then ...

(g·f)(9) = g(9)·f(9) = 248·2

(g·f)(9) = 496

8 0

2 years ago