can you help me please?

Answer:

n = 3

Step-by-step explanation:

to find the value of n

we need to transpose

7n + 12 = 3n+ 8n

7n + 12 = 11n

12 = 11n -7n

12 = 4n

n = 12/4

n = 3

if ur trying to find the value of n then n=3

Answer: Fourth Choice. 66

Concept:

Here, we need to understand the idea of evaluation.  

When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.

Solve:

Given information

n = 3

Given expression

6 (n² + 2)

Substitute values into the expression

=6 (3² + 2)

Simplify exponents

=6 (9 + 2)

Simplify values in the parentheses

=6 (11)

Simplify by multiplication

=[tex]\boxed{66}[/tex]

Hope this helps!! :)

Please let me know if you have any questions

Answer:

Step-by-step explanation:

[tex]\displaystyle \Large \boldsymbol{} 6(n^2+2) = 6(3^2+2)=66[/tex]

Answer:

2

Step-by-step explanation:

The slope is 2

{y = kx + m, k is the slope}

Answer:

400cm²

Step-by-step explanation:

the surface area of the sphere =

4/3 x The total surface area of a hemisphere

=> 4/3 x 300 = 400cm²

Answer:

b+5≤-24. Hope this helps:)

Step-by-step explanation:

Answer:

[tex]1)18 \times 2 + 6(4 + 1) - 2 \\ = 36 + 6 \times 5 - 2 \\ = 36 + 30 - 2 \\ 36 + 28 \\ = 64 \\ \\ thank \: you[/tex]

Answer:

18×2+6(4+1)-2

= 36+6×5-2

= 36+30-2

= 66-2

=64

Step-by-step explanation:

The equation in the question is false.

[tex]x - 2 = 3(x - 4)[/tex]

[tex]x - 2 = 3x - 12[/tex]

[tex]3x - x = 12 - 2[/tex]

[tex]2x = 10[/tex]

[tex]x = 10 \div 2[/tex]

[tex]x = 5[/tex]

Answer: 3.3 × 10⁹

Concept:

When multiplying exponents, add the exponents together.

When dividing exponents, subtract the exponents.

Solve:

Given expression

(3 × 10⁴) × (1.1 × 10⁵)

Put like terms together

=3 × 1.1 × 10⁴ × 10⁵

Combine like terms

=3.3 × 10⁴⁺⁵

=[tex]\boxed{3.3*10^9}[/tex]

Hope this helps!! :)

Please let me know if you have any questions

Answer:

3.3×10^9

Step-by-step explanation:

Answer:

28

Step-by-step explanation:

Given formula:

4s

It is given that the variable, s, is equal to 7. Therefore, plug in 7 for s in the expression:

4s

4(7)

Next, multiply straight across:

4 * 7 = 28

28 is your answer.

~

Answer:

answer is 28

Step-by-step explanation:

it is simple put the value of S in formula and then solve

Step-by-step explanation:

Answer:

10n+(10 x 15)

or

(10 x n)+150

either way it would be 270

Answer:

The answer is 0.15372

Step-by-step explanation:

Answer:

(x-5)(x-6)

Step-by-step explanation:

-6-5=-11

-6 times -5=30

so...

(x-5)(x-6) and -5 and -6 are the factors.

reflection in the x axis

x,y=x-y

-2,2

2,-2

-1,4

1,-4

3,4

3,-4

Answer:

I guess answer is 86. ...........

Answer:

1. (1, 2)

2. (-5, 7)

3. (-6, -5)

4. (0, -3)

Step-by-step explanation:

(1 - 4) Explanation:

If we're asked to move to the right, make the x-coordinate a positive number.

If we're asked to move to the left, make the x-coordinate a negative number.

If we're asked to move upwards, make the y-coordinate a positive number.

If we're asked to move downwards, make the y-coordinate a negative number.

Answer: 17 and 23 (cm)

Step-by-step explanation:

Let c1 and c2 the side of thr squares.

[tex]\left\{\begin{array}{ccc}4*c_1+4*c_2&=&160\\c_1^2+c_2^2&=&818\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}c_1+c_2&=&40\\c_1^2+(40-c_1)^2&=&818\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}c_1+c_2&=&40\\c_1^2+-40c_1+391&=&0\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}c_1&=&23\\c_2&=&17\\\end{array}\right.\ or\ \left\{\begin{array}{ccc}c_1&=&17\\c_2&=&23\\\end{array}\right.\\[/tex]

Step-by-step explanation:

I can't understand it so plz don't mind or else I will mind

Answer:

93.75%

This type of problem you have to REVERSE the question...

"at least one tail" is all possibilities EXCEPT "all heads"...

so your answer is 100% - P(4 heads)

P(4 heads) = (1/2)^4 = .0625

1 - .0625 = .9375

Step-by-step explanation:

(B) 0

We have

[tex]p^2 = 2q^2 \implies \dfrac{p^2}{q^2} = \left(\dfrac pq\right)^2 = 2[/tex]

but 2 is not a square number.

Answer:

x³ + x² + x

Step-by-step explanation:

(3x³ + 4x²) - (2x³ + 3x² - x) ← distribute parenthesis

= 3x³ + 4x² - 2x³ - 3x² + x ← collect like terms

= x³ + x² + x

[tex] \sqrt{11} \: lies \: between \: 3 \: and \: 4[/tex]

Answer:

Lies between 3&4

See THE IMAGE FOR SOLUTION

Step-by-step explanation:

140/70=2 Therefore, 1 apple equals 2 percent

The remaining 30 percent times 2 equals 60

60 apples plus 140 apples equals 200 apples

Answer B

Answer:

200.

Step-by-step explanation:

70% is equivalent to 140

10 %  .............................. 140/7 = 20 apples

100% ................................. 10*20 = 200.

Answer:

37

Step-by-step explanation:

85.1÷ 2.3​

=> 85.1/2.3 [Removing the decimals]

=> 851/23

=> 37

Answer:

where is the list at?

Step-by-step explanation:

Answer:

50cm, 99cm, 145cm

Step-by-step explanation:

The perimeter is just the distance around the triangle. We have all three sides.

So

(x+2) + (2x + 3) + (3x + 1) = 294

Combine like terms

6x + 6 = 294

Subtract 6 on both sides

6x = 288

Divide 6 on both sides

x = 48

So the sides are

x + 2 = 48 + 2 = 50 cm

2x + 3 = 2(48) + 3 = 96 + 3 = 99 cm

3x + 1 = 3(48) + 1  = 145 cm

Checking, first:

50 + 99 + 145 = 194 cm

Plug in x = 48 to the original equation.

48 + 2 + 2(48) + 3 + 3(48) + 1 = 294

48 + 2 + 96 + 3 + 144 + 1 = 294

294 = 294

The lengths of the sides of the triangle are 50 m, 99 m, and 125 m.

The perimeter of a triangle is defined as the addition of the lengths of the triangle's three sides.

The sides of triangle are x + 2, 2x + 3, and 3x + 1.

Given that the perimeter of a triangle is 294 cm

Since the perimeter of a triangle is the addition of the lengths of the triangle's three sides.

So the perimeter of a triangle = sum of all sides

⇒ x + 2 + 2x + 3 + 3x + 1 = 294

⇒ 6x = 294 - 6

⇒ x = 288/6

⇒ x = 48

So the length of the first side = 2+48 = 50

So the length of the second side = 2(48 ) +3 = 99

So the length of the second side = 3(48) + 1 = 125

Thus, the lengths of the sides of the triangle are 50 m, 99 m, and 125 m.

Learn more about the perimeter of a triangle here:

brainly.com/question/24388271

#SPJ2

Answer:

to do this just plote the numbers in replacement of the x. I attached a co table below.

Step-by-step explanation:

Step-by-step explanation:

1. 1.45^(-0.7) = 0.771

2. (4/3)^(2.7) = 2.174

1:-

[tex]\\ \sf\longmapsto 1.45^{-0.7}[/tex]

[tex]\\ \sf\longmapsto 1.45^{-\frac{7}{10}}[/tex]

[tex]\\ \sf\longmapsto 0.771[/tex]

2:-

[tex]\\ \sf\longmapsto \left(\dfrac{4}{3}\right)^{2.7}[/tex]

[tex]\\ \sf\longmapsto \left(\dfrac{4}{3}\right)^{\frac{27}{10}}[/tex]

[tex]\\ \sf\longmapsto 2.174[/tex]

Answer:

x is less than or equal to 4. Not sure how you would type that out on the slide though. :\

Step-by-step explanation: