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ololo11 [35]
3 years ago
9

3(a + 4) = 3a + 4 Question 3 options: True False

Mathematics
2 answers:
sergiy2304 [10]3 years ago
8 0
The answer to this is False.  Because 3Xa would be 3a, then 3X4 would be 12.  Therefore your new sentence would be, 3a + 12 = 3a + 4
sattari [20]3 years ago
4 0
Simple...

you have: 3(a+4)=3a+4

You're deciding whether it's true or false..to do so, simplify it..

3(a+4)=3a+4

3*a=3a
3*4=12

3a+12=3a+4

As we can see here, they do no match. False.

Thus, your answer.
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An unusually wet spring has caused the size of a mosquito population in some city to increase by ​8% each day. If an estimated ​
tatyana61 [14]

Answer:

The number of mosquitoes that will inhabit the city on May 25 is 4,471,200.

Step-by-step explanation:

Note: This question is not complete as some important figures and points are omitted. The complete question is therefore provided before answering the question as follows:

An unusually wet spring has caused the size of a mosquito population in some city to increase by ​8% each day. If an estimated ​180,000 mosquitoes are in the city on May 12​, find how many mosquitoes will inhabit the city on May 25. Use y= 18​0,000(1.08)x where x is number of days since May 2.

The explanation to the answer is now given as follows:

Given;

y = 18​0,000(1.08)x = 18​0,000 * 1.08 * x .................... (1)

Where;

y = Number of mosquitoes that will inhabit the city on May 25 = ?

x = Number of days since May 2 = 25 - 2 = 23

Substituting for x = 23 into equation (1), we have:

y = 18​0,000 * 1.08 * 23

y = 4,471,200

Therefore, the number of mosquitoes that will inhabit the city on May 25 is 4,471,200.

3 0
2 years ago
All of the following ratios are equivalent except _____. Answers
const2013 [10]

Divide all the ratios and compare:

8/12 = 0.666

15/10 = 1.5

2/3 = 0.666

6/9 = 0.666

The one that isn't equivalent is 15 over 10

3 0
3 years ago
Read 2 more answers
What is a linear equation for the cost of a cell phone that is $549.99 that has a 30 month installment plan?
erica [24]
Y = mx + b

y = 30x + $549.99
7 0
3 years ago
How do you know that 4/11 is a repeating decimal?
Leokris [45]

Answer:

by dividing it= 4/11

=0.363636363636

3 0
3 years ago
A ball slides up a frictionless ramp. It is then rolled without slipping and with the same initial velocity up another frictionl
KATRIN_1 [288]

Answer:

Rolling case achieves greater height than sliding case

Step-by-step explanation:

For sliding ball:

- When balls slides up the ramp the kinetic energy is converted to gravitational potential energy.

- We have frictionless ramp, hence no loss due to friction.So the entire kinetic energy is converted into potential energy.

- The ball slides it only has translational kinetic energy as follows:

                                   ΔK.E = ΔP.E

                                   0.5*m*v^2 = m*g*h

                                    h = 0.5v^2 / g

For rolling ball:

- Its the same as the previous case but only difference is that there are two forms of kinetic energy translational and rotational. Thus the energy balance is:

                                  ΔK.E = ΔP.E

                                  0.5*m*v^2 + 0.5*I*w^2 = m*g*h

- Where I: moment of inertia of spherical ball = 2/5 *m*r^2

             w: Angular speed = v / r

                               0.5*m*v^2 + 0.2*m*v^2 = m*g*h

                               0.7v^2 = g*h

                               h = 0.7v^2 / g

- From both results we see that 0.7v^2/g for rolling case is greater than 0.5v^2/g sliding case.

4 0
3 years ago
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