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2 years ago

-4(2k – 1) +9k - 15 simplify expression

Mathematics

2 answers:

Aneli [31]2 years ago

7 0

Answer:

k - 11

Step-by-step explanation:

Firstly, we have to distribute: -8k + 4 + 9k - 15

Collect like terms: 1k - 11 OR k - 11

pentagon [3]2 years ago

6 0

Step one - multiply the expression within brackets:
-8k + 4 + 9k - 15

Step 2 - reduce k’s and numbers:
k - 11

That’s it! :)

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An equation is shown below: 8x + 2(x – 7) = 7x + 3x – 14 Part A: Solve the equation and write the number of solutions. Show all

marta [7]

Answer:

Infinitely Many
Distributive Property

Step-by-step explanation:

8x + 2(x - 7) = 7x + 3x - 14

8x + 2x - 14 = 7x + 3x - 14 Distributive property.

10x - 14 = 10x - 14 Combine the like terms.

-14 = -14 Subtraction.

0 = 0 Addition.

Since the statement 0 = 0 is true regardless of the value of x, there is infinitely many solutions.

7 0

1 year ago

Will give brainlist

viktelen [127]

Answer:

See explanation.

Step-by-step explanation:

A terminating decimal is a decimal that has an end.
A repeating decimal is a decimal fraction in which a number, or a group of numbers, is repeated indefinitely.
Most repeating decimals contain a nine in the denominator, when written in fraction form.
Both can be written in fraction form.
Both can have a positive or negative value that can be both large and small.

5 0

2 years ago

A motorboat travels Downstream on a river for 5 hours. The speed of the current is 2 km/h. The river flows into a still Lake and

lara [203]

Answer:

I think it is 10 km/hr

Step-by-step explanation:

5 hrs = 40 more with 2 km/hr current

2 hrs= less 40 no current

40-2x5=30

30 without current for three hours

30/3=10 km/hr no current

CHECK

10x2=20

10x5=50+2x5=60

8 0

2 years ago

use the elimination method to solve the system of equations.choose the correct ordered pair. -3y=x-5 x+5y=7.

Paraphin [41]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}-3y=x-5&\text{subtract x from both sides}\\x+5y=7\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-x-3y=-5\\x+5y=7\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad2y=2\qquad\text{divide both sides by 2}\\.\qquad\qquad y=1\\\\\text{Put the value of y to the second equation:}\\x+5(1)=7\\x+5=7\qquad\text{subtract 5 from both sides}\\x=2$

5 0

2 years ago

Use intercepts to graph x-6y=24

Taya2010 [7]

Step-by-step explanation:

x-6y=24

Isolate the Y variable

-6y=-x+24

y=(1/6)x -4

In this case, -4 is the y intercept. Plot a point on the Y-axis (0, -4)

1/6 is the slope. You go up one unit, and then you go right 6 units to plot your next point.

Here is a great website to solve problems like these

Desmos Graphing Calculator

Just google it!

I hope this helps.

5 0

3 years ago

-4(2k – 1) +9k - 15 simplify expression​

-4(2k – 1) +9k - 15 simplify expression