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cestrela7 [59]
3 years ago
8

1. Choose the correct simplification of the expression −5x2(4x − 6x2 − 3).

Mathematics
1 answer:
nlexa [21]3 years ago
6 0
1) <span>30x4 − 20x3 + 15x2

This is the answer to 1. Don't forget to rearrange the terms in ascending order. That can trip people up. 

2) </span><span>x3 + 8x2 + 13

Don't forget to check the terms sign. The subtraction symbol switches them all. </span>
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You randomly choose one paper clip from a jar. In the jar there are 6 green, 3 white, 4 red, 2 blue, and 5 yellow paper clips.
Taya2010 [7]

Answer:

3/10

Step-by-step explanation:

Total paper clip =6+3+4+2+5

=20

Probability of green = number of green/total

= 6/20

leaving in it's lowest term

probability of green=3/20

4 0
3 years ago
Write the exact value of, or estimate, the side length of a square with an area of 100 square units.
timofeeve [1]

Answer:

l =10 units, 9.7 units, 5.5 units

Step-by-step explanation:

Area = length x breadth

Area of a square = l^2

100= l^2

√100 =√l^2

l=10 units

95=l^2

√95 = √l^2

l= 9.7 units

30=l^2

√30=√l^2

l= 5.5 units

6 0
3 years ago
Evaluate 3^-3 x 3^4 x 3 x 3^-5 Answers<br> a. -27<br> b. 1/27<br> c. -81<br> d. 1/81
Sauron [17]
The answer is b. 1/27
3^-3=1/27 and 3^4=81. 1/27×81=3. 3×3=9. 3^-5=1/243. 1/243×9= 1/27. The answer is b. 1/27.
8 0
3 years ago
The line AB had midpoint (2, 5).<br><br>A has coordinates (1, 2).<br><br>Find the coordinates of B.
sveta [45]

Answer:

The line AB, with A(Ax, Ay), B(Bx, By) and midpoint M(Mx, My) satisfying:

Ax + Bx = 2Mx

Ay + By = 2My

=>

2 + Bx = 2*1

5 + By = 2*2

=> Bx = 0

=> By = -1

=> B(0, -1)

Hope this helps!

:)

5 0
3 years ago
Read 2 more answers
The force f acting on a charged object varies inversely to the square of its distance r from another charged object. When 2 obje
o-na [289]

Answer:    The force, F, acting on a charged object varies inversely to the square of its distance, r, from another charged object. When the two objects are 0.64 meter apart, the force acting on them is 8.2 Newtons

Step-by-step explanation: )

7 0
3 years ago
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