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andrew-mc [135]
3 years ago
10

9x - 4 = 5, x = 1. tell whether x = 1 makes this equation true or false.

Mathematics
1 answer:
blondinia [14]3 years ago
7 0
The equation is true you just half to plug in the 1 for your x.
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ASAP! GIVING BRAINLIEST! Please read the question THEN answer correctly! No guessing.
Elza [17]

Answer:

C. F(x) = 0.4^2-1

Step-by-step explanation:

Since the function is being subtracted by 1, this means it will shift 1 unit downwards. When the number being multiplied to the function is less than one, it widens, which in this case the number 0.4 is less than 1.

4 0
3 years ago
The density of ethanol is around 0.8g/mL. What is the mass of 20mL of ethanol?
Harman [31]

Answer: 0.7893g//mL

If 20 mL of ethanol (density =0.7893g//mL) is mixed with 40mL water (density = 0.9971g//mL)

Step-by-step explanation:

4 0
4 years ago
I REALLY NEED HELP ON THIS PLS HELP
Eva8 [605]

Part (a)

Answer: See the attached image below to see the filled out chart.

Note how rational and irrational numbers have nothing in common. This means there is no overlap. So they go in the rectangles. The two sets of numbers join up to form the entire set of real numbers.

Integers are in the set of rational numbers. This is because something like 7 is also 7/1; however 1/7 is not an integer. So not all rational numbers are integers. The larger purple circle is the set of integers.

The smaller blue circle is the set of whole numbers. The set of whole numbers is a subset of integers. Recall the set of whole numbers is {0,1,2,3,...} so we ignore the negative values only focusing on 0 and positive numbers that don't have any fractional values. In contrast, the set of integers is {..., -3, -2, -1, 0, 1, 2, 3, ...} here we do include the negatives.

============================================================

Part (b)

1) Some irrational numbers are integers.

This is false. An irrational number is not rational. The set of integers is contained entirely in the set of rational numbers.

---------------------------------

2) Some whole numbers are not irrational numbers.

This is false. The statement implies that some whole numbers are irrational, but the set of whole numbers is inside the set of rational numbers, which has no overlap with the irrationals. The statement should be "All whole numbers are not irrational numbers".

---------------------------------

3) All rational numbers are whole numbers.

This is false. A rational number like 1/3 is not a whole number.

---------------------------------

4) All integers are whole numbers

This is false. An integer like -44 is not a whole number because the set of whole numbers is {0,1,2,3,...} and we're not including negative values.

---------------------------------

In summary, all four statements for part (b) are false.

8 0
3 years ago
Read 2 more answers
Select the equation in which the slope equals 11 and the y-intercept equals -2.
kirill115 [55]

Answer: y=11x-2


Step-by-step explanation:

1. By definition, the equation of the line has the following form:

y=mx+b

Where <em>m</em> is the slope and <em>b</em> is the y-intercept.

2. Keeping the information above on mind, you the problem says that the slope is 11 and the y-interecept is -2, then:

m=11\\b=-2

3. Substitute these values into the equation of the line and you obtain that the equation of that line is:

y=11x-2


7 0
4 years ago
Read 2 more answers
Saving?
nikitadnepr [17]

Answer:

A man borrows * 8000

He agrees to repay with a total interest of 1360 in 12 monthly instalments.

Each instalment being less than the preceding one by * 40

                                                                      =  \frac{12}{1360} x 40

                                                                      = 12 x 34

                                                                      = 408 (Ans)

                                                             

7 0
3 years ago
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