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3 years ago

What is the domain of 2x+5

Mathematics

1 answer:

Oksi-84 [34.3K]3 years ago

3 0

The domain is "x", because that is what you input

hope this helps

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What's the depth of 5cm

nordsb [41]

Answer:

what?

Step-by-step explanation:

7 0

3 years ago

5. Solve this system of equations. 3x + 4y = 36 y = -x +8. <br><br>please help meee3333............

Yanka [14]

Answer:

x = -4 and y = 12

Step-by-step explanation:

Since you have y = -x + 8 you can substitute this into the first equation where y was so you have 3x + 4(-x + 8) = 36.

That way, there is only one variable and it is easier to solve.

3x + 4(-x + 8) = 36

3x -4x + 32 = 36

-x +32 = 36

-x = 4

x = -4

Plugging this into the equation y = -x +8,

y = -(-4) + 8

y = 4 + 8

y = 12

7 0

3 years ago

The surface area S of a cube is equal to the sum of the areas of the 6 square faces that form the cube. We want to paint the cub

Ostrovityanka [42]

Answer: x equals 23

Step-by-step explanation: The information available to us is as follows;

Surface area of the cube = 1944

Side length of the cube = x - 5

Note however that the surface area is also derived as S = 6s²

In order to calculate the value of s we would start by substituting for the known values as follows;

S = 6s²

1944 = 6[(x - 5)²

1944 = 6[(x² - 10x + 25)]

By cross multiplication we now have

1944/6 = (x² - 10x + 25)

324 = x² - 10x + 25

Collect like terms and we now have;

x² - 10x -299 = 0

By factorization we now have;

(x - 23) (x + 13) = 0

Therefore, x - 23 = 0 and hence x = 23

x + 13 = 0 and hence x = -13

Knowing that the length of the side is not a negative number, we would choose x = 23.

**(Having been given that x = 23,

s = x - 5

s = 23 - 5

s = 18)**

6 0

3 years ago

In △ABC, m∠A=57°, m∠B=37°, and a=11. Find c to the nearest tenth.

kykrilka [37]

Answer:

$c=13.1\ units$

Step-by-step explanation:

step 1

Find the measure of angle C

Remember that the sum of the interior angles of a triangle must be equal to 180 degrees

A+B+C=180°

we have

A=57°

B=37°

substitute

57°+37°+C=180°

94°+C=180°

C=180°-94°=86°

step 2

Find the measure of side c

Applying the law of sines

$\frac{a}{sin(A)}=\frac{c}{sin(C)}$

substitute

$\frac{11}{sin(57\°)}=\frac{c}{sin(86\°)}$

$c=\frac{11}{sin(57\°)}sin(86\°)$

$c=13.1\ units$

8 0

3 years ago

Wht is the estimate of 6,904

DIA [1.3K]

Your answer is 6,900 because 904 is close to 900 and then after you just add the 6 so then if you put it together you will get 6,900

5 0

3 years ago

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