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3 years ago

Please help (picture) its due in an hour

Mathematics

2 answers:

Fofino [41]3 years ago

6 0

Answer:

$a) \: \: 6x - 8$

$b) \: \: - 18 {x}^{2} + 15$

$c) \: \: {x}^{4} + 2 {x}^{3} + 7 {x}^{2}$

Step-by-step explanation:

$a) \: \: 2(3x−4) \\ 2(3x)+2(−4) \\ 6x+2(−4) \\ 6x−8$

$b) \: \: −3(6 {x}^{2} −5) \\ −3(6 {x}^{2} )−3( - 5) \\ - 18 {x}^{2} - 3( - 5) \\ - 18 {x}^{2} + 15$

$c) \: \: {x}^{2} ( {x}^{2} + 2x + 7) \\ {x}^{2} {x}^{2} + {x}^{2} (2x) + {x}^{2} \times 7 \\ {x}^{4} + 2 {x}^{2} x + 7 \times {x}^{2} \\ {x}^{4} + 2 {x}^{3} + 7 {x}^{2}$

<h3>Hope it is helpful....</h3>

Tresset [83]3 years ago

5 0

Answer:

a) 6x-8

b) -18x^2-15

c) x^4+2x^3+7x^2

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Twice the sum of a number and 5 is equal to three times the difference of the number and 2

Alexxx [7]

Answer:16

Step-by-step explanation:

Let the number be X

Twice the sum of a number and 5

= 2X+5

Three times the difference of the number and 2

= 3(X - 2)

Since Twice the sum of X and 5 is equal to three times the difference of the X and 2, This means

2(X + 5 )= 3(X - 2)

2X +10 = 3X - 6

3X -2X = 10 + 6 = 16

X = 16

Check

2×(16+5) =3×(16-2)

2×21 = 3×14

42 = 42

3 0

3 years ago

A space telescope on a mountaintop is housed inside of a cylindrical building with a hemispheric dome. If the circumference of t

Vlad1618 [11]

Answer:

$185553.7\text{ feet}^3$

Step-by-step explanation:

GIVEN: A space telescope on a mountaintop is housed inside of a cylindrical building with a hemispheric dome. If the circumference of the dome is $84\text{ feet}$ , and the total height of the building up to the top of the dome is $91\text{ feet}$ .