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4 years ago

Help help hhhhhhhhgh

Mathematics

2 answers:

bixtya [17]4 years ago

8 0

Answer:x=2

Step-by-step explanation:

scZoUnD [109]4 years ago

6 0

Answer:

Simplifying

3(2x + 1) + 2(2x + 1) + 7 = 42 + -5x

Reorder the terms:

3(1 + 2x) + 2(2x + 1) + 7 = 42 + -5x

(1 * 3 + 2x * 3) + 2(2x + 1) + 7 = 42 + -5x

(3 + 6x) + 2(2x + 1) + 7 = 42 + -5x

Reorder the terms:

3 + 6x + 2(1 + 2x) + 7 = 42 + -5x

3 + 6x + (1 * 2 + 2x * 2) + 7 = 42 + -5x

3 + 6x + (2 + 4x) + 7 = 42 + -5x

Reorder the terms:

3 + 2 + 7 + 6x + 4x = 42 + -5x

Combine like terms: 3 + 2 = 5

5 + 7 + 6x + 4x = 42 + -5x

Combine like terms: 5 + 7 = 12

12 + 6x + 4x = 42 + -5x

Combine like terms: 6x + 4x = 10x

12 + 10x = 42 + -5x

Solving

12 + 10x = 42 + -5x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '5x' to each side of the equation.

12 + 10x + 5x = 42 + -5x + 5x

Combine like terms: 10x + 5x = 15x

12 + 15x = 42 + -5x + 5x

Combine like terms: -5x + 5x = 0

12 + 15x = 42 + 0

12 + 15x = 42

Add '-12' to each side of the equation.

12 + -12 + 15x = 42 + -12

Combine like terms: 12 + -12 = 0

0 + 15x = 42 + -12

15x = 42 + -12

Combine like terms: 42 + -12 = 30

15x = 30

Divide each side by '15'.

x = 2

Simplifying

x = 2

Step-by-step explanation:

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andrew11 [14]

Answer:

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Step-by-step explanation:

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4 0

3 years ago

Just the 3rd and 4th plz help me

svlad2 [7]

Answer:

Step-by-step explanation:

Now the key here is manipulating the scale:

For 3 every 2cm = 15mi

Divide by 2 so every 1cm = 7.5mi

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Hopefully this is right and it helps!

8 0

4 years ago

A test to measure psychotic tendencies was given to a group of 1,000 air force cadets who wished to work in nuclear silos. Any c

Anastaziya [24]

Answer:

Option d) 840

Step-by-step explanation:

Given that a test to measure psychotic tendencies was given to a group of 1,000 air force cadets who wished to work in nuclear silos.

If Score ≥64 would be eliminated.

X is N(52, 12)

Probability for any random person to get eliminated

= $P(X\geq 64)\\= 1-R(64)\\=1-0.8413\\= 0.1587$

Now coming to sample size of 1000 people, we find each person is independent of the other and there are two outcomes either >64 or < 64

So Y no of persons who get more than 64 is binomial with n =1000 and p = 0.1587

Mean of Y = E(Y)

= no of people who were not accepted $=1000(0.1587) = 158.7$

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6 0

4 years ago

What is the length of side BC of the triangle?

aalyn [17]

The length of bc is 72

8 0

3 years ago

Find the length of the missing side

Alex73 [517]

Answer:

25 in and 9 cm

Step-by-step explanation:

Using Pythagoras' identity

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides.

let x be the missing side

x² = 7² + 24² = 49 + 576 = 625 ( take square root of both sides )

x = $\sqrt{625}$ = 25

x² + 12² = 15²

x² + 144 = 225 ( subtract 144 from both sides )

x² = 81 ( take square root of both sides )

x = $\sqrt{81}$ = 9

4 0

3 years ago

Read 2 more answers