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3 years ago

Rewrite the expression without using grouping symbols.

2 answers:

8 0

When we distribute, we multiply the number outside of the parenthesis to every number inside the parenthesis.

So we have:

$\sf-6(8+12)$

$\boxed{\sf(-6)\cdot8+(-6)\cdot12}$

RUDIKE [14]3 years ago

7 0

We use the distribution method that says a(b + c) = a x b a x c, so your answer would be B.

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21x - 17x +19 = y<br> Solve for x

Serggg [28]

X= y/21 -2/21
Hope it helps :)

7 0

3 years ago

What is the rate and unit rate of 5 pencils for 13 dollars?

Anuta_ua [19.1K]

$unit\ rate=\frac{cost}{number\ of\ pencils}\\\\
cost=13\ dollars\\
number\ of\ pencils=5\\\\
unit \rate= \frac{13}{5}=2\frac{3}{5}\frac{dollars}{pensil}\\\\
 Unit\ rate\ is\ 2\frac{3}{5}\ dollars\ per\ one\ pensil$

8 0

3 years ago

If (x 2y)dy/dx=2x-y what is the value of.

Radda [10]

The second differential of the function is 3/7

Given the differential function $(x +2y)=\frac{dy}{dx} (2x-y)$

Differentiate both sides with respect to x implicitly

$(x +2y)=\frac{dy}{dx} (2x-y)$

$1+2y'=y"(2x-y)+y'(2-y') \\y''=\frac{1+2y'}{(2x-y)+y'(2-y') }$

Get the first derivative at the point (3, 0)

$y'=\frac{2x-y}{x+2y} \\y'=\frac{2(3)-0}{0+2(3)}\\y'=\frac{6}{6} \\y'=1$

Substitute into the second derivative to have:

$y''=\frac{1+2y'}{(2x-y)+y'(2-y') }\\y''=\frac{1+2(1)}{(2(3)-0)+(1)(2-(1)) }\\y''=\frac{3}{6+1} \\y''=\frac{3}{7}$

Hence the second differential of the function is 3/7

learn more on differential equation here; brainly.com/question/18760518

Complete question:

If (x 2y)dy/dx=2x-y what is the value of $\frac{d^2y}{dx^2}$ the point (3,0)

7 0

2 years ago

Really need help with this paper

Darina [25.2K]

Answer:

The answer to your question is below

Step-by-step explanation:

1.- (2b - 1) (b + 8) = 0

2b - 1 = 0 b + 8 = 0

b = 1/2 b = -8

2.- (x + 3)(x - 12) = 0

x + 3 = 0 x - 12 = 0

x = -3 x = 12

3.- (4b+ 7)(b + 11)

4b + 7 = 0 b + 11 = 0

b = -7/4 b = -11

4.- (k - 8)(k + 6)

k - 8 = 0 k + 6 = 0

k = 8 k = -6

5.- (2n + 12)(5n+ 10)

2n + 12 = 0 5n + 10 = 0

n = -12/2 = -6 n = -10/5 = -2

6.- (w - 3)(3w - 7)

w - 3 = 0 3w - 7 = 0

w = 3 w = 7/3

7.- (6n - 5)(n - 10)

6n - 5 = 0 n - 10 = 0

n = 5/6 n = 10

8.- (n + 12)((4n + 7)

n + 12 = 0 4n + 7 = 0

n = -12 n = -7/4

9.- (3b + 4)(5b - 10)

3b + 4 = 0 5b - 10 = 0

b = -4/3 b = 10/5 = 2

10.- (p - 6)(p + 10)

p - 6 = 0 p + 10 = 0

p = 6 p = -10

3 0

3 years ago

9). Four friends earned $4.20 for washing a car. They decided to split the money equally. How much money did each friend get?

V125BC [204]

Answer:

1.05

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers