A math class is having a discussion on how to determine if the expressions 4 x minus x + 5 and 8 minus 3 x minus 3 are equivalent using substitution. The class has suggested four different methods.

Which describes the correct method?
*Both expressions should be evaluated with one value. If the final values of the expressions are both positive, then the two expressions must be equivalent.
*Both expressions should be evaluated with one value. If the final values of the expressions are the same, then the two expressions must be equivalent.
*Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are positive, then the two expressions must be equivalent.
*Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are the same, then the two expressions must be equivalent.

Answer:

Both angles add up to 90° so they are complementary angles, x = 55

Step-by-step explanation:

=> We know that both angles add to 90°, so the equation will be;

(x - 20) + (x) = 90

=> Using algebra if solved all the way down, "x" will be 55.

Hope this helps!

Answer:

22 feet/s

Step-by-step explanation:

Answer:

Step-by-step explanation:

The units of measurement listed below are suitable:

ft/sec

ft/min

miles/hr

Weren't there more choices?

Answer:

Both -1.5 and -3/2 will be halfway between -2 and -1 on the number line. 3/2 will be halfway between 1 and 2. -4/3 will be between -1.5 and -1.

Answer:

Well I can’t really do anything, the best thing I can tell you is that for each number, look at each option and Plot it from there.

You can turn all these into decimals since the number line is a whole number line and decimals are easier to work with in this situation then fractions. So you would have

-1.5, 1.5, -1.5, and -1.33333...

So -1.5 and -3/2 are the same so thats one plot, that would go between -1 and -2.

1.5 goes between 1 and 2

And -1.333...goes more closer to -1 between -2 and -1

Answer:

3 yrs

Step-by-step explanation:

1st year=600*1.05=630

2nd year=630*1.05=661.5

3rd year=661.5*1.05=794.57

Answer:

Step-by-step explanation:

The small squares represent 30 (each one is equal to 10) if the 2 rows of squares represent  200, if the two rows of 10 squares only represent 20 becuase 10+10=20 then the squares equal 210 (each square equals 70)

Answer:

It is ten

Step-by-step explanation:

Answer:

is something supposed to be there

Step-by-step explanation:

Answer:

B 66%

Step-by-step explanation:

100% (total) - 34% (P(not landing on blue)) = 66%

Answer:

In your head, you can convert the fraction 3/12 into a decimal. So divide 3 by 12 and you would get 0.25. I hope this helps :)

Step-by-step explanation:

Answer:

D. 4.35 minutes

Brainliest pls

Step-by-step explanation:

Answer:

get a ruler and meshure out 72 millimeters.

Step-by-step explanation:

did exam

Answer: I'm just gonna answer this question. Use a ruler with millimeters.

Step-by-step explanation:...yea-

a) a+b=b+a

the commutative property of whatever number is it turned around

b) a * b= b*a

the commutative property of whatever number is it turned around

c) b+0=b

the additive property is whatever adds to zero is that number.

d) b*1=b

the multiplication property of one is whatever mutilply by 1 is that number.

Answer: the answer is c

Step-by-step explanation:

Because I did the test

Answer:

C

Hope This Helps!

Answer: It would be Second leg = 15

Step-by-step explanation:

From my understanding, you are supposed to find the second leg of the right triangle by Pythagoras theorem.

Hypotenuse: 25

One leg: 20

Second leg: x

Pythagoras theorem: hypotenuse² = adjacent² + opposite²

c² = a² + b²

25² = 20² + b²

b² = 25² - 20²

b² = 625 - 400

b² = 225

b = √225

b = 15

Therefore, the second leg of the right triangle is 15.

Answer:

area of triangular logo = ½ × base × height

= ½ × 8 × 11

2

= 22 in²

Answer:

22

Step-by-step explanation:

If you multiply the base times height, which would be 8 * 5 1/2, You get 44. Then multiply that by 1/2 to get the area, and you get 22.

Hope this helps!

Answer:

19.7

Step-by-step explanation:

64 miles converts to 3.25 inches on the map

64/3.25 = 19.7 mi/inch

Answer:

1. X is added to 8

2. Subtract 14 by a number

3. Multiply 2 after you add 3 into a number.

4.. Twice a number plus 3

5. Divide 15 by a number

Step-by-step explanation:

Answer:

last 2

(2xn) +3

[tex]y\sqrt{15}[/tex]=x (X x Y) = 15

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

the midian is the middle

Given : 2, 3, 8, 9, 2, 4, 7, 2 .

To Find: Median of data .

Solution : Firstly arranging the data in ascending order we get , 2 , 2 , 3 , 4 , 7 , 8 , 9 . Here number of terms = 7 .

So the median will be the middlemost value.

Here the middle most value is 4 .

Therefore the median is 4 .

Answer:

the ft is 97.3 repeating or 1168 inches

Step-by-step explanation:

Letter C, E, and F: 2 8/10, 2.8, and 28/10

Step-by-step explanation: The shaded pillars/rectangles inside the squares account for the fractions. In this question, there are 10 pillars per square and 2 shaded in squares. Since there are two full squares, there are two wholes. In the third block, there are only 8 shaded. Because 8 out of ten are shaded, the fraction would be 8/10 (said as eight tenths). Overall, there are two wholes (the shaded squares) and 8/10 of a whole. Therefore, it is 2 8/10. 0.8 equals 8/10 (you can determine it by the way it is said ex: you would say “zero and ...” (and = decimal) “... eight tenths” or just “eight tenths” for .8, and 8/10 is said the same way). Since 2.8 and 2 8/10 are equal, 2.8 would also be an answer. 28/10 would be another correct answer because the two wholes/squares each have 10 pillars. In total, there are 20 pillars for the two wholes. If the 8/10 (8 out of 10) is added, the total would be 28/10. Hope this helps!

Answer:  12.89 I think

Step-by-step explanation:

Answer:

b=3

Step-by-step explanation:

Isolate the b:

Check your answer:

Answer:

Pretty sure it's 38 ft^2

Step-by-step explanation:

Formula for circles=πr^2

So radius is 3.5 because radius is half the diameter

so 3.5^2=12.25

And 12.25 times 3.14 is your answer

Answer:

x^2 -8x -65

Step-by-step explanation:

Answer:

x^2-8x-65

Step-by-step explanation:

FOIL it out

Answer: D. 48in²

Step-by-step explanation:

[tex]A=\frac{1}{2}bh\\A=\frac{1}{2}(16)(6)\\A=48in^{2}[/tex]

Answer:

B) 140

Step-by-step explanation:

August 8: 20 tickets

August 10: 20 tickets

August 11: 25 tickets

August 12: 40 tickets

August 13: 35 tickets

Added all together, it's 140 tickets sold.  So, Option B is correct.

Hope this helps! :)

Answer:

10 C

Step-by-step explanation:

easy put 50 for F