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LUCKY_DIMON [66]
3 years ago
15

Please help, having a bit of trouble with it.

Mathematics
1 answer:
Dimas [21]3 years ago
4 0

Answer:

.9b+2

Step-by-step explanation:

You first add 3.8b and -2.9b which equals .9b

Then you add -7 and 9 which equals 2

Hope this helped!

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how much of other chemicals must be evaporated from 400grams of a hand sanitizer that is 24% alcohol to strengthen it to a hand
tatiyna

Answer:

80 grams

Step-by-step explanation:

Weight of 24% solution = 400 grams

Alcohol content= 24%

Amount of alcohol= 400*0.24= 96 grams

Weight of 30% solution with same amount of alcohol:

  • 96/0.3= 320 grams

The difference in weights is the other chemicals evaporated:

  • 400-320=80 grams
4 0
3 years ago
Peter inherits 15.000 dollars and place money with a bank. The interest rate are 3 percent. How many money will he get after 1ye
NeTakaya
The simplest form of an interest equation is A = P(1+rt)

where A = the total amount of money at the end, P = the principal (or amount of money you started with), r = the rate in percent, and t = the time in years.

In this case, P = 15000, r = 0.03 (because 3% in decimal form is 0.03), and t = 1:

A=P(1+rt)\\A=15000(1+0.03*1)\\A=15000(1+0.03)\\A=15000(1.03)\\A=15450

So, after 1 year he will get $15450 back, making him $450 more.
5 0
4 years ago
What is 3+15*3 what is the answer
Kazeer [188]
48
The answer to the question is 48
5 0
3 years ago
Read 2 more answers
a car travels from A to city B. for the first 30 minutes, the car travels at the constant speed of 45 mph. the car speed up and
Masteriza [31]

Answer:217.5 miles

Step-by-step explanation:

6 0
4 years ago
(3x2 + 9x + 6) - (8x2 + 3x - 10) + (2x + 4)(3x - 7)
nika2105 [10]

Answer:

Let's simplify step-by-step.

3x2+9x+6−(8x2+3x−10)+(2x+4)(3x−7)

Distribute:

=3x2+9x+6+−8x2+−3x+10+(2x)(3x)+(2x)(−7)+(4)(3x)+(4)(−7)

=3x2+9x+6+−8x2+−3x+10+6x2+−14x+12x+−28

Combine Like Terms:

=3x2+9x+6+−8x2+−3x+10+6x2+−14x+12x+−28

=(3x2+−8x2+6x2)+(9x+−3x+−14x+12x)+(6+10+−28)

=x2+4x+−12

Answer:

=x2+4x−12

3 0
3 years ago
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