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zepelin [54]
2 years ago
9

What do all points that lie on the y-axis have in common in terms of their coordinates?

Mathematics
1 answer:
vitfil [10]2 years ago
5 0
For all points that lie on the y-axis, the x-coordinate is zero.
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Which of the following algebraic expressions is not simplified?
AlladinOne [14]

Answer:

Option D. a^2+6ab-2ba

Step-by-step explanation:

Option D because we have like terms: 6ab and -2ba=-2ab, then

a^2+6ab-2ba=a^2+6ab-2ab

Simplifying on the right side of the equation adding like terms:

a^2+6ab-2ba=a^2+4ab

6 0
3 years ago
Can someone please solve these?
JulijaS [17]

Answer:

Step-by-step explanation:

h = -6t^{2} +20t + 4

I will use calculus,  maybe that's not how you're supposed to do this

-12t +20 =0

12t = 20

t = 20 /12

t = 1 \frac{8}{12}

t = 1 \frac{2}{3}

there will be a max at  1.6666666666  seconds

-6*1.6666666666666^{2}  + 20 * 1.6666666666  +4

= 16.666666666666 + 33.333333333333 + 4

= - 16\frac{2}{3} + 33 \frac{1}{3} + 4

= 20\frac{2}{3}  feet max height ( not too high,  for a rocket)

time of flight:

0 = -6t^{2} +20t + 4

use quadratic formula to find t

-20 +- sqrt [ 20^{2} - 4*(-6)*4 ] / 2*(-6)

-20 +- sqrt [400 + 96 ] / -12

-20 +- sqrt [496 ] / -12

-20 +- 22.27105 / -12

try the negative option 1st

-42.27105 / -12

3.522 seconds.     time of flight

when will the rocket be at 12' ? :

12 = -6t^{2} +20t + 4

0 = -6t^{2} +20t -8

use quadratic formula again to find t

-20 +- sqrt [ 20^{2} - 4*(-6)*(-8) ] / 2*(-6)

-20 +- sqrt [ 400 - 192 ] / -12

-20 +- sqrt [208 ] / -12

-20 - 14.4222 / -12

-34.4222 / -12

2.8685 seconds ( on the way down)

and

-20 + 14.4222 / -12

-5.578 / - 12

0.4648  seconds ( on the way up )

6 0
3 years ago
the units digit of a two digit number is 10. If the digits are reversed, the new number is 9 less than the original number. find
Irina-Kira [14]

Answer: the units digit has to be a 1 digit number not 2

Step-by-step explanation:

4 0
3 years ago
On January 15 a seller paid $960. In annual property for the current calendar year. A buyer is purchasing the home with the clos
sladkih [1.3K]

Answer:

The answer is "800"

Step-by-step explanation:

The total tax  = $ 960

Total number of days  =300

day =300

Seller credit =?

Formula:

\bold{\text{Seller credit} = \frac{\text{total tax} \times \text{number of days}}{\text{day}}}

                   = \frac{960 \times 300}{360}\\\\= \frac{32 \times 300}{12}\\\\= 8 \times 100\\\\=800

8 0
3 years ago
What is the answer for this
Georgia [21]
The domain is all real numbers
5 0
3 years ago
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