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agasfer [191]
2 years ago
5

A student concluded that the solution to the equation sqrt2x+1 +3=0 is x=4. Do you agree? Why or why not?

Mathematics
1 answer:
Katyanochek1 [597]2 years ago
5 0

Just put 4 as x in the equation and solve it. The new equation is:

sqrt(2*4)+1+3 = 0

Now we can solve it.

sqrt(2*4) becomes sqrt8:

sqrt8+1+3=0. -------> sqrt8+4=0

The sqrt of 8 is about 2.83.. so 2.83+4 is:

6.83

So we have 6.83 as the answer

but 6.83 does not equal 0 so x cannot equal 4

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This graph shows a proportional relationship.
Kamila [148]

Answer:

The constant of proportionality is 0.3, or K=0.3.

Step-by-step explanation:
The chart I attached shows points that are plotted on the proportional line. In order to find the constant of proportionality from these points, you have to divide the amount of change by the number of years. For example, 3 divided by 10 or 6 divided by 20. This results in 0.3, which means that every year, there is 0.3 centimeters of change in the sea level.

8 0
2 years ago
Plz do all plz i will give brainlest and thanks to best answer
Talja [164]

Answer: 25.     -17, -14, -3, 0, 2, 7

26.                          -26, -21, -13, -1,  5

27.   -17, -16, -11, -4, 2, 9

28.    -75, -63, -60, -52, 12, 70

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Will give brainliest IF CORRECT
hammer [34]

Answer:

They are supplementary angles.

Hope it will help :)

3 0
2 years ago
Need help real fast please help really need it
Vladimir79 [104]

Answer:

burrito price=$8

Taco Price=$6

Step-by-step explanation:

x=burrito price

y=taco price

3x+4y=48

solve for y

y= −3 /4 x+12

plug in

6x+2y=60

6x+2( −3 /4 x+12)=60

6x+2( −3 /4 x+12)=60

x=8

now plug in for x

3x+4y=48

3(8)+4y=48

y=6

y=6

x=8

burrito price=$8

Taco Price=$6

8 0
3 years ago
#3 (1 pt) A certain baseball card is very rare and is currently worth $2000. If the price of this card increases by 3% a year,
Galina-37 [17]

Answer:

$2000x(1.03)ˣ

Step-by-step explanation:

This is known as compound interest.

100% + 3% = 103%, so we put this into a decimal: 1.03

We now put this into the equation:

$2000x(1.03)ˣ

If you want to work out the price after, say 3 years, then you would change x to 3, so the equation becomes

$2000x(1.03)³

You can then use a calculator to work out the answer.

6 0
2 years ago
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