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Vikki [24]
3 years ago
11

Simplify by combining like terms 6a + 3b + a + 2

Mathematics
1 answer:
IrinaK [193]3 years ago
6 0

Answer:

7a+3b+2

Step-by-step explanation:

6a+3b+a+2

Use commutative property of addition x+y=y+x

6a+3b+a+2=6a+(a+3b)+2

use associative property of addition x+(y+2)=(x+y)+2

6a+(a+3b)+2=(6a+a)+3b+2\\=7a+3b+2

Hence 6a+3b+a+2=7a+3b+2

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The radius of Earth is about 3960 miles. The radius of the moon is about 1080 miles. a. Find the surface area of Earth and the m
Molodets [167]

A) The formula for surface area of a sphere is A = 4*PI*r^2

using 3.14 for PI:

Surface area for Earth = 4 * 3.14 x 3960^2 = 196,960,896 miles^2

Surface area of the moon: 4 * 3.14 * 1080^2 = 14,649,984 miles^2

B)Divide the Surface of the Earth by the moon:

196,960,896 / 14,649,984 = 13.44

The Earths surface is 13.4 times larger than the moon.

C) Multiply the surface of the Earth by 70%:

196,960,896 * 0.70 = 137,872,627.2 million square miles of water.

4 0
3 years ago
find the total thickness of two pieces of wood that a carpenter glued together IF one piece is 6/16 inches thick and the other p
Alexus [3.1K]

Answer:

It is simple add 6/16 + 7/8 = 20 /16 simplified will be 5/4 then in improper fraction will be 1 1/4 inches thick is the final answer.

Step-by-step explanation:

3 0
3 years ago
Penelope made note of all the bicycles and cars she could see parked or locked on acertain city block. All the cars had exactly
lesantik [10]

Given:

The number of cycles is, <em>n</em> (s) = 7.

The number of wheels in the cycle is, <em>n </em>(sw) = 2.

The number of cars is, <em>n</em> (c) = 15.

The number of wheels in the car is, <em>n</em> (cw) = 4.

The obective is to find the total number of wheels.

The total number of wheels is,

\begin{gathered} T=n(sw)\cdot n(s)+n(cw)\cdot n(c) \\ =2\cdot7+4\cdot15 \\ =14+60 \\ =74\text{ whe}els \end{gathered}

Hence, there are 74 wheels in the block.

If there are <em>x</em> bicycles and <em>y </em>cars, the equatioin will be,

\begin{gathered} T=n(sw)\cdot x+n(ce)\cdot15 \\ T=2x+4x \end{gathered}

Hence, the number of wheels for x bicycles and y cars is 2x+4x.

6 0
1 year ago
Kyle is 37 years old and wants to accumulate $1,000,000 by the time he is
Delvig [45]
Ngl idk but just be a nice person and mark as brainliest please
6 0
3 years ago
An experiment was conducted to evaluate the success of an Ebola virus vaccine. The subjects were unaware of the treatment they w
Irina-Kira [14]

Answer:

your answer would be

B complexity

I agree that it is B but would suggest that you also consider the implications of each answer. They are all technically correct.

A is correct simply due to the fact that the longer time passes without an ebola cure, the more people can be potentially infected with it, resulting in less healthy individuals that may be able to volunteer to test potential ebola vaccines. Scientists need healthy volunteers from affected regions in order for rapid clinical trials to occur.

B is correct because of the nature of epidemics. A combination of technical, social, economic, and geographical obstacles slow the progress and dissemination of ebola vaccine information.

C is correct because finance impacts everything from finding resources used in studying ebola to distributing vaccines to affected areas. Economic imbalances or money shortages negatively impact research.

D is correct due to many social factors (more of a subjective answer). Some people think that vaccine distributors discriminate against certain ethnic groups. Others think the governments/other organizations are not effective enough at managing the situation. Still others feel that the search for a cure is not being approached in the right way. In all, there are multiple ways to oppose different aspects of ebola research.

Ultimately, B is correct because it seems to capture the meaning of A, C, and D together. 

6 0
3 years ago
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