All categories

2 years ago

The temperature outside dropped 13°F in 7 hours. The final

Mathematics

1 answer:

QveST [7]2 years ago

8 0

Answer:

11 degrees

Step-by-step explanation:

We can write an equation

x - 13 = -2 Add 13 to both sides

x = 11

You might be interested in

PLEASE HELP CANT GET THIS WRONG ASAP

bogdanovich [222]

Answer:

∠ B = 108°

Step-by-step explanation:

∠ A and ∠ B are Alternate exterior angles and congruent, thus

6x + 18 = x + 93 ( subtract x from both sides )

5x + 18 = 93 ( subtract 18 from both sides )

5x = 75 ( divide both sides by 5 )

x = 15

Thus

∠ B = x + 93 = 15 + 93 = 108°

3 0

3 years ago

Read 2 more answers

What 1 +1x5-5x9 i really need to know this by the next second

denis23 [38]

Answer: -39

Step-by-step explanation:

Hope this helps.

4 0

3 years ago

Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

hram777 [196]

Write the system in augmented-matrix form:

$\left[\begin{array}{ccc|c}2&2&4&16\\5&-2&3&-1\\1&2&-3&-9\end{array}\right]$

Multiply through row 1 by 1/2:

$\left[\begin{array}{ccc|c}1&1&2&8\\5&-2&3&-1\\1&2&-3&-9\end{array}\right]$

Add -1(row 1) to row 3, and add -5(row 1) to row 2:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&-7&-7&-41\\0&1&-5&-17\end{array}\right]$

Swap rows 2 and 3:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&-5&-17\\0&-7&-7&-41\end{array}\right]$

Add -7(row 2) to row 3:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&-5&-17\\0&0&-42&-160\end{array}\right]$

Multiply through row 3 by -1/42:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&-5&-17\\0&0&1&\frac{80}{21}\end{array}\right]$

Add 5(row 3) to row 2:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&0&\frac{43}{21}\\0&0&1&\frac{80}{21}\end{array}\right]$

Add -1(row 2) and -2(row3) to row 1:

$\left[\begin{array}{ccc|c}1&0&0&-\frac53\\0&1&0&\frac{43}{21}\\0&0&1&\frac{80}{21}\end{array}\right]$

So the solution to the system is

$x=-\dfrac53,y=\dfrac{43}{21},z=\dfrac{80}{21}$

7 0

4 years ago

Read 2 more answers

WHO EVER ANSWERS FAST ILL GIVE YOU BRAINLEST

lapo4ka [179]

Perpendicular = opposite sign and reciprocal slope
-4 slope turns into 1/4
Y = 1/4x + b
11 = 1/4(-16) + b
11 = -4 + b, b = 15
Solution: y = 1/4x + 15

8 0

3 years ago

Read 2 more answers

3 is subtracted from the square of a number.

frozen [14]

Answer:

$x^{2}$ -3

Step-by-step explanation:

Three subtracted by a square of a number. So, let's say the number is x. The square of it is $x^{2}$ . So $x^{2}$ -3 is three subtracted by a square of a number.

7 0

3 years ago