How many solution do these equations have How many solutions do these equations have?y = 2x + 4
2y = 4x + 8

Answers

Answer 1
Answer: If we subtract double the second equation from the first, we get:

2y-2y=4x-4x+8-8

0=0

Therefore, the two equations are actually equivalent.  As a result, there are infinite solutions to this system.

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2x + 3y = 15
x + y = 6

Answers

Answer:

y=3

x=3

Step-by-step explanation:

2x +3y=15

2x-2y=-12

y=3

x=3

Dion flips a coin 20 times and records if it comes up heads. If getting heads is a success, what is the probability of a success on each roll?. 0.2.
0.3.
0.5.
1.00

Answers

Answer:

0.5.

Step-by-step explanation:

A probability is the division of the number of desired outcomes by the number of total outcomes.

In this problem:

A coin can be either heads or tails, so there are two possible outcomes.

The desired outcomes is heads, so there is one desired outcomes.

So the probability of a success on each roll is 1/2 = 0.5

If the coin is fair, the probability of a success on each roll is 0.5.

Which fractions are equivalent to -30/48 ?A.
-5/8

B.
-15/24

C.
10/-16

D.
− 35 over 65 star times

Answers

The answer is D

Because

-35/65 = -0.53


I hope that's help:)

In March, a dealership sold 115 vehicles. In April, the same dealership sold 31.3% more vehicles than they sold in March. How many vehicles were sold in April?

Answers

It would be (115*131.3)/100 = 15099.5/100 = 150.99

Approx. 151 vehicles were sold in April

150.9 cars. so basically 150

A closed container has 6.08 ⋅ 1023 atoms of a gas. Each atom of the gas weighs 1.67 ⋅ 10–24 grams. Which of the following shows and explains the approximate total mass, in grams, of all the atoms of the gas in the container?

Answers

Total mass = 6.08 x 10^23 * 1.67 x 10^-24 = 1.01536

Answer:

10.1536*  10^(-1)\approx 1.02 grams.

Step-by-step explanation:

We have been given that a closed container has 6.08* 10^(23) atoms of a gas. Each atom of the gas weighs 1.67* 10^(-24) grams.

To find the total mass, in grams, of all the atoms of the gas in the container, we will multiply number of atoms with mass of each atom.

\text{Total mass}=6.08* 10^(23)* 1.67* 10^(-24)

Using exponent property a^b* a^c=a^(b+c), we will get:

\text{Total mass}=6.08* 1.67*  10^(23)* 10^(-24)

\text{Total mass}=10.1536*  10^(23+(-24))

\text{Total mass}=10.1536*  10^(-1)

\text{Total mass}=10.1536*(1)/(10)

\text{Total mass}=1.01536

\text{Total mass}\approx 1.02

Therefore, the approximate total mass, in grams, of all the atoms of the gas in the container is 10.1536*  10^(-1)\approx 1.02 grams.

Priya said that neither 8 nor 3 could be the solution to the equation. Explain why she is correct?

Answers