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3 years ago

PLEASE HELP MEEE AM BEING TIMED

Mathematics

2 answers:

const2013 [10]3 years ago

6 0

Answer:

Physical:

1. a sheet of copper

2. A banana is yellow.

3. Barium melts at 725 degrees Celsius.

5. a diamond is the hardest natural substance.

7. A bar of lead...

Chemical:

4. gasoline is flammable

6. helium does not react...

8. potassium metal...

9. an apple...

10. silver tarnishes...

Hope this helps! Tell me if I am wrong on any.

Step-by-step explanation:

Physical is something that can change but it is still considered the same substance. Chemical is when they change and it becomes something new.

svet-max [94.6K]3 years ago

4 0

Answer:

1st is physical, 2nd is chemical, 3rd is chemical, 4th is chemical, 5th is physical, 6th is chemical, 7th is physical, 8th is physical, 9th is chemical and 10th is chemical

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The top two most profitable Fortune 500 companies in 2016 were Apple and JP Morgan Chase & Co. JP Morgan Chase & Co.'s r

svetlana [45]

Answer:

a. 53.4

b. 24.4

Step-by-step explanation:

a+j=77.8

j=a-29

a+j=77.8

-a+j=-29

2j=48.8

j=24.4

a+24.4=78.8

a=53.4

5 0

3 years ago

1.) Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth .x squared minus 21 x equals n

Andrew [12]

Part 1
We are given $x^2-21x=-4x$ . This can be rewritten as $x^2-18x=0$ .
Therefore, a=1, b=-18, c=0.
Using the quadratic formula
$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}=\frac{-\left(-18\right)\pm \sqrt{\left(-18\right)^2-4\left(1\right)\left(0\right)}}{2\left(1\right)}$
$x=\frac{18\pm 18}{2}$

The values of x are
$x_1=\frac{18-18}{2}=0$
$x_2=\frac{18+18}{2}=18$

Part 2
Since the values of y change drastically for every equal interval of x, the function cannot be linear. Therefore, the kind of function that best suits the given pairs is a quadratic function.

Part 3.
The first equation is $y=x^2+2$ .
The second equation is $y=3x+20$ .

We have
$x^2+2=3x+20$
$x^2-3x-18=0$
Factoring, we have
$\left(x-6\right)\left(x+3\right)=0$
Equating both factors to zero.
$x_1-6=0\rightarrow x_1=6$
$x_2+3=0\rightarrow x_2=-3$

When the value of x is 6, the value of y is
$y=3\left(6\right)+20=38$

When the value of x is -3, the value of y is
$y=3\left(-3\right)+20=11$

Therefore, the solutions are (6,38) or (-3,11)

7 0

3 years ago

Please help first answer will be marked brainiest

Tresset [83]

Answer:

Step-by-step explanation:

add sides up

5 0

3 years ago

If you help me just explain it to me

love history [14]

Answer:

Step-by-step explanation:

lets find median 2, 4, 4, 5, 6, 8, 9, 10, 10, 13, 17

now lets find the lower quartile median and upper quartile median

we don't include the median in the count, only use it to divide the data into the two parts,

2, 4, 4, 5, 6, 8, 9, 10, 10, 13, 17

so lower quartile median is 4,

2, 4, 4, 5, 6, 8, 9, 10, 10, 13, 17

while upper quartile median is 10

the box represents the range between the upper quartile median and lower quartile median, thus is should go from 4 to 10 with the middle line, representing the median at 8,

the whiskers represent the whole data range

thus, the answer is C

6 0

3 years ago

.!.!..!.!..!.!..!.!.!..!.!!..!9

vladimir1956 [14]

Answer:

47 degrees

Step-by-step explanation:

total degrees in a triangle is 180

since this is a right triangle there is a 90 degree in there and it also gives the 43 degree

subtract 90 and 43 from 180 and you get 47

3 0

3 years ago