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Elena L [17]
3 years ago
13

Combine these to like terms to create an equivalent expression: 4z - (-3z)

Mathematics
1 answer:
inysia [295]3 years ago
5 0

Answer:

7z

Step-by-step explanation:

4z-(-3z)

4z+3z->double neg=addition

7z

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Dave has 25 3/4 feet of piping and needs to cut it in 1 1/2 foot measurements for a project. How many pieces of piping will he e
Ostrovityanka [42]

Answer: 17 1/6 or  17-18

(u guess which is right if its an integer ^^)

Step-by-step explanation:

25 3/4 ÷ 1 1/2

First change the mixed fractions to improper fractions.

<u>25 3/4 </u>= <u>103/4</u>

<u>1 1/2 </u>= <u>3/2</u>

Now divide: 103/4 ÷ 3/2

103/4 * 2/3 (multiply by flipping the second fraction)

= 206/12

Now divide: 206 ÷ 12

= 17 2/12 (<u>simplified:</u> 17 1/6)

<u><em>The answer will be 17 1/6 </em></u> (OR 17-18)

5 0
1 year ago
X^2 - 8x = 3 by completing the square
Anit [1.1K]
<h2>Solving Quadratic Equations by Completing the Square Method</h2><h3>Answer:</h3>

x = 4 +\sqrt{19} and x = 4 -\sqrt{19}

<h3>Step-by-step explanation:</h3>

Recall:

x^2 -2ax +a^2 = (x -a)^2

x^2 -8x = 3 \\ x^2 -8x +16 = 3 +16 \\ (x -4)^2 = 19 \\ x -4 = ±\sqrt{19} \\ x = 4 ±\sqrt{19}

3 0
2 years ago
(-1.1)^13 x (-1.1)^12 / (-1.1)^10 x (-1.1)^1
olga nikolaevna [1]

Answer:

15.455

Step-by-step explanation:

3 0
3 years ago
Yasmin went to the store and bought 3 1/2 pounds of ground beef for $11.20. How much did the ground beef cost per pound?
Kisachek [45]

Answer:

Step-by-step explanation:

m,m

6 0
3 years ago
For the following pair of variables, state the units that might be used to measure each variable. Then state whether you believe
AfilCa [17]

Answer:

The correct answer is:

There is a positive correlation because women's weight tend to increase when height increases (D)

Step-by-step explanation:

The units that might be used to measure each variable are:

Height : meter (m) or foot (plural, feet) (Ft.)

weight : kilograms (kg) or Pounds (lb)

A positive correlation is said to occur between two variables when they both move in the same direction, that is, when they both increase or decrease, while a negative correlation occurs when the movement is not in tandem, i.e, as one increases, the other decreases. The relationship between height and weight is a positive correlation because, an increase in height, which is mainly as a result of elongation of bones, leads to an accumulated increase in total body mass, which in turn increases the body weight.

8 0
3 years ago
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