2 years ago

Please help !!! I will give 20 points to correct answer !!!!

Mathematics

2 answers:

Sonja [21]2 years ago

4 0

Answer:

the answer above the image

seropon [69]2 years ago

4 0

Answer:

a=-4/3, 14/3

Step-by-step explanation:

absolute value only makes the answer become positive whether the value inside is negative or positive.
so -3a+5=9 or -3a+5=-9 all works

-3a+5=9

-3a=4

a=-4/3

If -3a+5=-9

-3a=-14

a=14/3

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PLEASE Help!!: Check for understanding:

Akimi4 [234]

1) Circumference: C = D × π = 40 × 3.14 = 125.6

Area: $S=r^2.\pi =(\frac{D}{2} )^2.\pi = (\frac{40}{2})^2.3,14=1256\\$

2) Perimeter: P = 10.82 +10.82 + 12 + ( 12 . 3,14 )/2 = 52.48 mm

Area: $S=\frac{9.12}{2}+(\frac{12}{2} )^2.\pi = 167.04$

ok done. Thank to me :>

8 0

2 years ago

What is the differentiation of 2cos2x

garri49 [273]

2cos2x=y

dy/dx(2cos2x)=-4sin2x

d/du cosu= u'×cos'u=-u'×sinu

d/du sinu= u'×sin'u= u'×cosu

d/du tanu = u'×(1+tan²u)

d/du cotu = u'×-(1+cot²u)

proof for cosu :

cos2x= 1-2sin²x

or 2cosx²-1

or cos²x-sin²x

we will one of this fro example let's take the first one

d/dx 1-2sin²x=0-2×2(sinx)×cosx=-2sin2x

and we have 2 in the begining so its -4sin2x

3 0

3 years ago

What is the sum of -3 X^2 - 7x + 9 and -5 X^2 + 6x - 4

Andrews [41]

Answer:

The sum is -8x^2 - x + 5

3 0

2 years ago

A woman is looking for a bigger square office. She finds an office twice the area of her current office. if the perimeter of her

insens350 [35]

.431 kL because 431×1000=.431

6 0

4 years ago

Square ABCD was translated using the rule (x, y) → (x – 4, y + 15) to form A'B'C'D'. What are the coordinates of point D in the

Andrew [12]

Answer: the rule is (x, y) → (x – 4, y + 15)

D’ in the image are (9, –8)?

x – 4= 9 y + 15= -8, so x=13, and y = - 8-15=-23

so D(13, -23)

7 0

3 years ago

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