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krok68 [10]
3 years ago
7

4ab (a -b) + b (2b -2a²) for a = 1 and b= -1 simplify it

Mathematics
2 answers:
grin007 [14]3 years ago
4 0

Answer:

by my calculations the answer is 10

Step-by-step explanation:

4×1(1-1)+1(2×1-4)

4+1(2-4)

5×2

10

aleksley [76]3 years ago
3 0

Answer:

Step-by-step explanation:

4ab(a-b)+b(2b-2a^2)

=4*1*-1[1-(-1)]+(-1){2(-1)-2*1^2}

=-4(1+1)-1{-2-2}

=-4*2-1(-4)

=-8+4

=-4

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How tall is a building 100 feet away if the angle of elevation from the ground to the
victus00 [196]

Answer:

i think it is 50ft but i'm not too sure

Step-by-step explanation:

if you take the 100ft and than use the 20 degrees and divide them you get 50 ? so maybe, just 100 divided by 20

5 0
3 years ago
Find the slope and the​ y-intercept of the line whose equation is negative 6 x plus y equals negative 7 −6x+y = −7.
astraxan [27]
-6x + y= -7

Add 6x on both sides to isolate y

Y= 6x-7

The slope is 6 and the y-intercept is -7

Hope this helps!


Please mark me as brainliest if you can, I really appreciate it!
5 0
3 years ago
Read 2 more answers
Rewrite each polynomial in standard form by applying the operations in the appropriate order: (x^2 − 4)(x +3) − (x^2 +2x − 5)
Nutka1998 [239]

Answer:

in standard form polynomial will be  x^3+2x^2-6x-7

Step-by-step explanation:

We have given equation (x^2-4)(x+3)-(x^2+2x-5)

We have to write this in standard form

For writing in standard form first we have to multiply and then subtract

So (x^2-4)(x+3)-(x^2+2x-5)=x^3-4x+3x^2-12-x^2-2x+5=x^3+2x^2-6x-7

So in standard form polynomial will be  x^3+2x^2-6x-7

4 0
3 years ago
A collection of nickels and dimes is worth 25 dollars. There are twice as many nickels as dimes. How many of each are there? Use
Drupady [299]
There are 125 dimes and 250 nickels.

A dime is 0.1$ and a nickel is 0.05$. The total number of them should give 25$.
The number of nickels are twice the number of dimes. So lets call the number of dimes X, then the number of nickels should be 2X.

Putting it in a formula: 0.05(2X) + 0.1X = 25.

Then by solving we get:
0.1X + 0.1X = 25
0.2X = 25
X = 25/0.2 = 125
6 0
3 years ago
Bob is driving along a straight and level road toward a mountain. At some point on his trip, he measures the angle of elevation
Leona [35]
Tan 21 44 =  h / 13428.7
h = 13428.7 * tan 21 44

Height =   5353 feet
3 0
3 years ago
Read 2 more answers
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