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Svetach [21]
3 years ago
11

Bài 1 : tìm tập xác định

Mathematics
1 answer:
rjkz [21]3 years ago
7 0

Answer:

4/3 * 1/2 ÷ 3/2

= 4/3 * 1/2 * 2/3

= 4/3 * 1 * 1/3

= 4/3 * 1*3

= 4/9

multiplicative inverse = 9/4

additive inverse = -4/9

please like me

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You need 300 mL of a 65% alcohol solution. On hand, you have a 50% alcohol mixture. How much of the 50% alcohol mixture and pure
artcher [175]

Answer:

You will need  220 mL of the 60% solution  and  80 mL of pure alcohol.

Step-by-step explanation:

Let 'x' be the amount of 50% alcohol solution and y the amount of pure alcohol.

Therefore:  

(0.5x + y)/300 = 0.65 ⇒ 0.5x + y = 190

x + y = 300

Solving the sistem of equations:

x = 220 and y = 080

Therefore, You will need

220 mL of the 60% solution

and  80 mL of pure alcohol.

8 0
3 years ago
Identify the initial amount and the growth rate of the following:<br> Y = 250 (1+0.2)
docker41 [41]

Answer:

y = 300

Step-by-step explanation:

y = 250 (1+0.2)

First add the 1 and 0.2

y=250(1.2)

multiply 250 with 1.2

y = 300

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3 0
3 years ago
1. (3x2 + 4x - 12) = (x + 5)<br> Divide using synthetic division
Kitty [74]
If you are solving for x then here’s how:

(3x2 + 4x - 12) = (x + 5)
Remove the x on the left by remove one x from both of the sides.
(3x2 + 3x - 12) = 5
Add 12 onto both sides
(3x2 + 3x) = 17
Multiply
(6 + 3x) = 17
Take away 6 from both sides
3x = 11
Divide by 3 on both sides
x = 3.666 recurring
4 0
3 years ago
Write a number sentence that<br> equals 4/6​
Arturiano [62]

when you have a function that is 4/6 think of it as reversed the number its going to be 4/6=6×4.

7 0
3 years ago
Jon bought a printer for $189 and a set of printer cartridges for $192. Sales tax on these items was 6.5%. What is Jon's total b
julia-pushkina [17]
So first we need to find the total before tax. Let's add up the two prices:

189+192=381

So we know that the total before tax is $381. Now we are told that the sales tax on these items is 6.5%. It would be easier for us to convert 6.5% to a decimal in order to multiply. Let's convert 6.5% to a decimal by dividing by 100:

\frac{6.5}{100}=0.065

Now that we have the sales tax in decimal form, let's multiply this sales tax by the total amount of the items before tax ($381):

381*0.065=24.77

This means that $24.77 is the tax for this purchase. To find the total amount that Jon paid for these items after tax, you must add the tax to the total amount before tax to give you:

381+24.77=405.77

So now we know that Jon's total bill for these items is $405.77.
4 0
3 years ago
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