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3 years ago

Z + 21/–1 = –3. z+21/-1 is a fraction

Mathematics

2 answers:

Stella [2.4K]3 years ago

6 0

Answer:

1 Move the negative sign to the left.

z-21=-3

2 Add 21 to both sides.

z=-3+21z=−3+21

3 Simplify -3+21 to 18

z=18

Step-by-step explanation:

hope it helps

Vika [28.1K]3 years ago

3 0

Answer:

No Answer

Step-by-step explanation:

$z+\frac{21}{-1} =-3*z+\frac{21}{-1}$

cancel out same on both sides

$0=-3$

N/A

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Nataly [62]

Answer:

speed acquired by me = 40 miles / hour

speed acquired by my friend = 50 miles / hour

Step-by-step explanation:

Here's the solution :-

time taken by both = 6 hours

( 10 AM - 4 PM )

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$\frac{distance}{time}$

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$40 \: mph$

2. Now, the required speed for my friend to reach boston at 4 PM is :

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$\frac{distance}{time}$

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$\frac{300}{6}$

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3 years ago

15x-(-3x-10)=38x-5(4x-2)

son4ous [18]

15x+3x+10 = 38x-20x+10
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18x-18x = 10-10
0 = 0
The equation is true.

8 0

3 years ago

Please help with 6 and 7

Ilya [14]

Answer:

6. The number is $-5$

7. The two numbers are $10$ and $11$

Step-by-step explanation:

Question six can be re-worded to create the following expression:

$-2=\frac{4x+10}{5}$

Solve for x to find the number:

$-2=\frac{4x+10}{5}\\-10=4x+10\\-20=4x\\\frac{-20}{4} = x\\-5 = x$

Question seven can be solved by first listing the constraints (assuming x is smaller than y):

x and y are less than 20
$x + 1 = y$
$3x - 8 = 2y$

To get the numbers, we can create a system of linear equations. First, solve for $y$ in each expression:

$y = x+1$

$2y = 3x-8\\y = \frac{3}{2}x - 4$

Solve for $x$ :

$x+ 1 = \frac{3}{2}x - 4\\x + 5 = \frac{3}{2}x\\5 = \frac{3}{2}x - x\\5 = \frac{1}{2}x\\10 = x$

Solve for $y$ :

$y = x + 1\\y = 10 + 1\\y= 11$

4 0

2 years ago

Read 2 more answers

What is the factorization of the expression below?

sesenic [268]

16x² - 49

= (4x)² - 7²

Identity =》 a² - b² = (a + b) (a - b)

(4x)² - 7²

= (4x + 7) (4x - 7) [3rd option]

_______

Hope it helps ⚜

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3 years ago

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The line through (-2, 3) with slope 2/3 in point slope form

Debora [2.8K]

Answer:

y - 3 = 2/3(x + 2)

Step-by-step explanation:

slope = 2/3

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y - 3 = 2/3(x + 2)

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2 years ago

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