2 years ago

Nine times the sum of a number and 2 is 8. Use the variable x for the unknown number

Mathematics

1 answer:

Tems11 [23]2 years ago

5 0

The equation will look like this …9(x + 2)=8

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A number, y, is five times another number, x. The sum of the two numbers is 42. Write the system of equations.

vovikov84 [41]

Answer:

5x+x=42

6x=42

x=7

Step-by-step explanation:

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2 years ago

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A painting crew reported that a job is 3/5 completed. What fraction of the job remains to be done?

Debora [2.8K]

Answer:

2/5

Step-by-step explanation:

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2 years ago

If the circumference is 3/2 pi what is the area

11111nata11111 [884]

Here is your answer

$\frac{9}{16} \pi \: {units}^{2}$

REASON:

Circumference(C)= 2πr

, where r is radius

Given

C= (3/2) π

So,

$2\pi \: r = \frac{3}{2}\pi$

$r = \frac{\frac{3}{2}\pi}{2\pi}$

$r = \frac{3}{4}$

Now,

$area = \pi {r}^{2}$

$= \pi \times { (\frac{3}{4}) }^{2}$

$= \frac{9}{16}\pi \: {unit}^{2}$

HOPE IT IS USEFUL

8 0

3 years ago

If the given ordered pair equal then find value of x and y (3x+5)=(x+2) and (4y+7)= (y+3)

Yanka [14]

Answer:

3x+5 =x+2

3x-x=2-5

2x= –3

x=-3/2

4y+7=y+3

4y–y =3-7

3y=–4

y= —4/3

7 0

2 years ago

Plzzz hurry up and help me if A+B=45 prove that (1+tanA)(1+tanB)=2

Solnce55 [7]

Answer:

see explanation

Step-by-step explanation:

If A +B = 45° then tan(A+B) = tan45° = 1

Expanding (1 + tanA)(1 + tanB)

= 1 + tanA + tanB + tanAtanB → (1)

Using the Addition formula for tan(A + B)

tan(A+B) = $\frac{tanA+tanB}{1-tanAtanB}$ = 1 ← from above

Hence

tanA + tanB = 1 - tanAtanB ( add tanAtanB to both sides )

tanA + tanB + tanAtanB = 1 ( add 1 to both sides )

1 + tanA + tanB + tanAtanB = 2

Then from (1)

(1 + tanA)(1 + tanB) = 2 ⇒ proven

7 0

3 years ago