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2 years ago

Three times a number, minus 5, is equal to two times the number, plus 9 find the number

Mathematics

2 answers:

STatiana [176]2 years ago

4 0

3x-5=2x+9 Solve for x

Mamont248 [21]2 years ago

4 0

14 is the answer.
3x-5=2x+9.

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R-(-4x - (y + y)); use x = -4, and y = -3 evaluate

Romashka-Z-Leto [24]

Answer:

insert values of x and y

r - ( -4(-4) - ( -3-3))

r - ( 16 +6 )

r - 22

Doneeeeeeeeeeeeeeeeee3

8 0

2 years ago

Please help need it asap!!!!!

Vlada [557]

Answer:

A. 6.89 m

Step-by-step explanation:

Pythagorean Theorem.

a^2+b^2=c^2

(1.5)^2 + (3.6)^2 = c^2

2.25 + 12.96 = 15.21

√15.21= 3.9

find the ratio from the the left triangle to the other -

2.65÷1.5= 1.766666 × 3.69 = 6.89

4 0

2 years ago

I really need help on both but if you can only answer one that's perfectly fine!

Fofino [41]

Answer:

110, 15%

Step-by-step explanation:

So for the first problem, recall that there is 100%. 12% of the answers on a test were missed.

There are 125 questions on the test.

To find the answer, what we can do it multiply 125 by 100%-12%

So 125*88%

THis can be looked at as:

125*.88

110

So we know the first answer is 110, now lets move onto the next one.

There a few ways of diong this, we could do 100%- each of the answers, and then multiply that by 2760 and see if we get 2400, but there is an easier way of doign this.

Take your 2760, and divide it by 2400. This will get you 1.15. So 2400 is increases by .15. This is equal to an increase of 15%.

There is a catch to this one however, when you divide 2400 by 2760, which should get you 85%, it gets you 86%. This would be 14%. So the answer seems to be 15%, but if not, its none of the above.

So answers:

110 and 15%(or none of the above)

Hope this helps! I am sorry about the bottom answer though, but 15% makes the most sense to me.

7 0

3 years ago

Read 2 more answers

Aviv thinks of two numbers between 6 and 50. The highest common factor of his two numbers is 5. The lowest common multiple of hi

slega [8]

Answer:

15 and 20.

Step-by-step explanation:

The 2 numbers are both divisible by 5.

Listing numbers whose LCM is 60 and divisible by 5.

20 and 30 :- not this as the HCF is 10.

15 and 20 : - HCF = 5 and LCM = 60.

5 0

2 years ago

Read 2 more answers

A container contains water at temperature 80 degree celcius. After every 10 minutes, the change in temperature is - 4 degree cel

lilavasa [31]

For this case, the first thing we must do is define variables.
We have then:
x: number of minutes
y: final temperature
We write then the equation that models the problem:
$y = (-4/10) x + 80
$
For y = 20 we have:
$20 = (-4/10) x + 80
$
Clearing x:
$(4/10) x = 80 - 20

x = (10/4) * 60

x = 150$
Answer:
The temperature of the water will be 20 degree celcius after 150 minutes

4 0

3 years ago