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77julia77 [94]
2 years ago
13

PLz help with these questions. For questions 1 and 2 , write each expression using a single exponent. 1)   x^9/x^2 2) h^14/h^5 F

or questions 3 and 4, simplify each expression. 3) 4^4/4^6 4) 5^0 For questions 6-8, multiply the following polynomial. 6) -2r( 8r + 5 ) 7) 4a( a^2 + 7a + 4 ) 8) ( 2y - 3 )( 3y - 2 )
Mathematics
1 answer:
Zepler [3.9K]2 years ago
4 0
For questions 1 and 2 , write each expression using a single exponent.

1) \ x^9:x^2=x^7\\
\\
2) \ h^{14}:h^{5}=h^9

<span>For questions 3 and 4, simplify each expression.
</span>
3) \ 4^4:4^6=4^{-2}=\frac{1}{4^2}=\frac{1}{16}\\&#10;\\&#10;4) \ 5^0=1

<span>For questions 6-8, multiply the following polynomial.
</span>
6) \ -2r(8r+5)=-16r^2-10r\\&#10;\\&#10;7) \ 4a(a^2+7a+4)=4a^3+28a^2+16a\\&#10;\\&#10;8) \ (2y-3)(3y-2)=6y^2-4y-9y+6=6y^2-13y+6




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What is the percent of change if 38 is decreased to 25? round to the nearest whole number
motikmotik

Answer:

7.89474% decrease

Step-by-step explanation:

Solution:

Calculate percentage change

from V1 = 38 to V2 = 35

(V2−V1)|V1|×100

=(35−38)|38|×100

=−338×100

=−0.0789474×100

=−7.89474%change

=7.89474%decrease

7 0
2 years ago
Four points are always coplanar if they: Check all that apply. A. lie on the same line. B. lie on different planes. C. lie on di
kotykmax [81]
<span>D. lie in the same plane.
</span><span>
The definition of capillarity is that points are considered as co-planar when these points are on the same plane, so it is obvious that the answer D is true because this statement is the definition of capillarity. This is shown in Figure 1.

</span><span>A. lie on the same line.
</span><span>
If four points lie on the same line then there will be a plane that contains this line, therefore the definition is fulfilled. This is shown in Figure 2.

</span><em>Finally, the correct answers are A. and D.</em>

5 0
3 years ago
Read 2 more answers
A submarine left Diego Garcia five hours before a cruise ship. The ships traveled in opposite directions. The cruise ship travel
Rina8888 [55]

Answer:

The speed of the submarine is 15.429 miles per hour.

Step-by-step explanation:

Let suppose that both ships travel at constant velocities. As we know that both travel in opposite directions, it is supposed that cruise ship moves in +x direction, whereas submarine in -x direction. Kinematic equations for each sheep are described below:

Ship

x_{Sh} = x_{o} + v_{Sh}\cdot t

Submarine

x_{Su} = x_{o}+v_{Su}\cdot t

Where:

x_{o} - Position of Diego Garcia island, measured in miles.

x_{Sh}, x_{Su} - Current positions of ship and submarine, measured in miles.

v_{Sh}, v_{Su} - Velocities of ship and submarine, measured in miles per hour.

t - TIme, measured in hours.

If we know that x_{Sh} - x_{Su} = 241\,mi, v_{Sh} = 19\,\frac{mi}{h} and t = 7\,h, then:

x_{Sh} - x_{Su} = (v_{Sh}-v_{Su})\cdot t

We clear now the velocity of submarine:

\frac{x_{Sh}-x_{Su}}{t} = v_{Sh}-v_{Su}

v_{Su} = v_{Sh}-\frac{x_{Sh}-x_{Su}}{t}

v_{Su} = 19\,\frac{mi}{h} -\frac{241\,mi}{7\,h}

v_{Su} = -15.429\,\frac{mi}{h}

Speed of the submarine is the magnitude of its velocity, which is 15.429 miles per hour.

4 0
3 years ago
How can I solve this problem?
HACTEHA [7]

Answer:

25*pi or

78.5 square units.

Step-by-step explanation:

If there was no shaded area, the area of the circle would be pi * r^2

r = 10

Area = pi * 10^2

Area = 100 * pi

Since there is a shaded area, the shaded part looks to be 1/4 of the whole. There's no indication of what it actually is, but 1/4 should be close enough.

Area_shade = 1/4 (100*pi)

Area_shade = 25 * pi

That's one answer.

Another is 25 * 3.14 = 78.5 square units

7 0
3 years ago
This is just for fun!
bixtya [17]
Addition or multiplication
add 2 or times 2
8 0
3 years ago
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