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Digiron [165]
3 years ago
13

−k+2(−2k−5) Simplify Will give brainliest

Mathematics
1 answer:
Elan Coil [88]3 years ago
8 0

Answer:-k+-4k-10; which is -5k-10

Step-by-step explanation:

first distribute.

then add.

done.

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Find two numbers with a sum of 20 and a difference of 6.
Alina [70]

Answer:

7 and 13

Step-by-step explanation:

x+y=20

x-y=6

2x=26, x=13, 13+7=20, 13-7=6.

4 0
3 years ago
Read 2 more answers
Find a cubic function f(x) = ax3 + bx2 + cx + d that has a local maximum value of 3 at x = −3 and a local minimum value of 0 at
Amiraneli [1.4K]

Answer:

The cubic function is f(x) = (27/32)·x  - 3/32·x³ - -9/32·x² - 9/32

Step-by-step explanation:

The given function is f(x) = a·x³ + b·x² + c·x + d

By differentiation, we have;

3·a·x² + 2·b·x + c = 0

3·a·(-3)² + 2·b·(-3) + c = 0

3·a·9 - 6·b + c = 0

27·a - 6·b + c = 0

3·a·(1)² + 2·b·(1) + c = 0

3·a + 2·b + c = 0

a·(-3)³ + b·(-3)² + c·(-3) + d = -3

-27·a + 9·b - 3·c + d = -3...(1)

a + b + c + d = 0...(2)

Subtracting equation (1) from equation (2) gives;

28·a - 8·b + 4·c = 3

Therefore, we have;

27·a - 6·b + c = 0

3·a + 2·b + c = 0

28·a - 8·b + 4·c = 0

Solving the system of equations using an Wolfram Alpha gives;

a = -3/32, b = -9/32, c = 27/32 from which we have;

a + b + c + d = 0 3 × (-3/32) + 2 × (-9/32) + (27/32) + d = 0

d = 0 - (0 3 × (-3/32) + 2 × (-9/32) + (27/32)) = -9/32

The cubic function is therefore f(x) = (-3/32)·x³ + (-9/32)·x² + (27/32)·x + (-9/32).

4 0
3 years ago
Please help with these math questions
anastassius [24]
4) x=16
Vertical angles have equal angles when two lines intersect, which they do in this case. 
3x-3=2x+13
Solve for x:
x=16

5) 34 degrees
Lines AK and MJ bisect each other perpendicually, so <ADJ is 90 degrees. 
4x+3x-8=90
7x-8=90
7x=98
x=14
<CDJ=3x-8
=3(14)-8
=34 degrees

Hope this helps :)

6 0
3 years ago
The mean beak depth of a particular finch species is 15 millimeters. assuming the trait is heritable what would happen to the me
Charra [1.4K]

Answer: the mean should not change.

Stabilizing selection: it is one type of the natural selection..

an intermediate variant selected by the nature has more survival rate against extreme and low variants. such variants are well adopted by the population and pass it for several generations without changes. it shows that the mean of the variant <span>will be stabilized for several generations</span>

4 0
3 years ago
What's a single digit odd number you'll get from dividing a two digit number with 2?
Andreas93 [3]

Answer:

A single-digit odd number you'll get from dividing a two-digit number with 2 is 7.

Step-by-step explanation:

If you were to divide 14 by 2, you would get 7, which is a single-digit odd number.

6 0
3 years ago
Read 2 more answers
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