Help??????? Please please help me please

Answer:

The number is 5

BRAINLIEST, PLEASE!

Step-by-step explanation:

8x + 2 = 2(21)

8x + 2 = 42

8x = 40

x = 5

In the expression, the value of number is 5.

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

We can to given that;

The algebraic expression is,

''A number is multiplied by 8, and that product is added to 2. The sum is equal to the product of 2 and 21.''

Now,

Let a number = x

Hence, We can formulate;

⇒ x × 8 + 2 = 2 × 21

⇒ 8x + 2 = 42

Subtract 2 both side,

⇒ 8x + 2 - 2 = 42 - 2

⇒ 8x = 40

Divide by 8;

⇒ x = 5

Thus, The value of number = 5

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Answer:

f(t)=-16t^2+8t+2

Step-by-step explanation:

You take f(t)=-16t^2, and for vt look at the initial velocity which was 8 and for s look at the height which was 2

Answer:

a function of x, the number of miles driven in a year.

Step-by-step explanation:

The slope of the line represents the cost of the maintenance and the cost of the fuel. Then the correct option is D.

A Linear system is a system in which the degree of the variable in the equation is one. It may contain one, two, or more than two variables.

In addition to fuel and maintenance, Rachel pays $1,000 a year for insurance. The equation will be

C = (0.05 + 0.14)x + 1000

C = 0.19x + 1000

Then the slope of the line will be

Slope = 0.19

The slope of the line represents the cost of the maintenance and the cost of the fuel.

More about the linear system link is given below.

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Step-by-step explanation:

a°+10°+a°+20°=180

becasue sum of angle of suplimentary angles is 180.

2a+30=180

2a=180-30

2a=150

a=75

Answer: (9)/(15)

Step-by-step explanation:

Hi! I'm happy to help!

To solve for the area of a semi-circle, we just need to find the area of a circle, and divide it by 2.

The equation for area of a circle is A=[tex]\pi[/tex]r²

It says we can use 3.14 for pi, so we can write our equation like this:

A=3.14(r²)

Since we are dealing with half of a circle, we can  write this as:

A=[tex]\frac{1}{2}[/tex](3.14(r²))

Our radius is a straight line going from the edge of the circle to the center. We have the diameter, which is just the radius doubled (because it goes from the edge to the center point then back to the edge). So, we divide our diameter by 2 to get our radius.

14÷2=7

Our radius is 7, so we can plug that into our equation:

A=[tex]\frac{1}{2}[/tex](3.14(7²))

Now all we have to do, is solve:

A=[tex]\frac{1}{2}[/tex](3.14(49))

A=[tex]\frac{1}{2}[/tex](153.86)

A=76.93

So, our area is 76.93 units².

I hope this was helpful, keep learning! :D

Answer:

-2 and 6

Step-by-step explanation:

[tex] - 4 + 8 - 2[/tex]

[tex] - 6 + 8[/tex]

[tex] = - 2[/tex]

○●○●○●○●○●○●○●○●○●○●○●○●○●○

[tex]8 - ( - 3) - 5[/tex]

[tex]8 + 3 - 5[/tex]

[tex] = 6[/tex]

Answer:

{(6, -6), (-9,2), (6, -1), (-8, -9)}

Answer:

=288

Step-by-step explanation:

(4yz)-3(x)

(4(4)(2))-3(-3)

(4x8)x9

32x9

288

Answer:

D

Step-by-step explanation:

|x+1|>2

-2>x+1>2

-3>x>1

Option D is correct that is the solution of the inequality |x+1|>2 is  x<-3 or x<1.

A statement of an order relationship—greater than, greater than or equal to, less than, or less than or equal to—between two numbers or algebraic expressions.

Solution of an inequality is a value that makes the inequality true.

According to the given question

We have an inequality |x + 1|>2.

The solution set of the above inequality is given by

[tex]|x + 1| > 2[/tex]

⇒ [tex]-2 > x+1 > 2[/tex]

⇒ [tex]-2-1 > x > 2-1[/tex]

⇒ [tex]-3 > x > 1[/tex]

⇒ [tex]x < -3[/tex] or [tex]x < 1[/tex]

Hence, option D is correct that is the solution of the inequality |x+1|>2 is  x<-3 or x<1.

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Answer:

t = d/r; t = 5

Step-by-step explanation:

Hi there!

1) Isolate t

d = rt

Divide both sides by r

d/r = rt/r

d/r = t

t = d/r

2) Solve for t when distance is 40 and the rate is 8

t = d/r

Replace d with 40 and rate with 8

t = 40/8

t = 5

I hope this helps!

Answer:  [tex]\sqrt{75}[/tex]

================================================

Explanation:

Square both 8 and 9 to get

Since 75 is between 64 and 81, this means [tex]\sqrt{75}[/tex] is between 8 and 9

Put another way, we can say this:

[tex]64 < 75 < 81\\\\\sqrt{64} < \sqrt{75} < \sqrt{81}\\\\\sqrt{8^2} < \sqrt{75} < \sqrt{9^2}\\\\8 < \sqrt{75} < 9\\\\[/tex]

Or we could use a calculator to find that:

Which is another way to see why [tex]\sqrt{75}[/tex] is between 8 and 9.

Answer:

ab and ed are opposite rays

Step-by-step explanation:

PLEASE MARK AS BRAINLIRST

Answer:

A pair of opposite rays are two rays that have the 'same endpoint and extend in opposite directions. So, together a pair of opposite rays always forms a straight line

an acid is a substance that donates protons ( in the brønsted - lowry definatiom) or accepts a pair of balance electrons to form a bond ( in the Lewis definition ) .

A base is a substance that can accept protons or donate a pair of valence electrons to form a bond . bases can be thought of as the chemical opposite if acids .

hope this helps you

mrk me braniliest plz

Answer:

a acid is a substance that can donate protons . or accepts the balance protons to form a bond .

a base is a substance that can accept protons or donate a pair of valence electrons to form a bond .

Answer:

(22.5 , 1)

Step-by-step explanation:

Midpoint formula= [tex]\frac{x^1+x^{2} }{2} +\frac{y^{1} +2^{2} }{2} =Midpoint[/tex]

[tex]\frac{27+18}{2}[/tex]=22.5

3+-1=2

2/2=1

So, midpoint is (22.5 , 1)

You can also graph it out and use Pythagorean theorem but that would overcomplicate the problem.

Answer:

r+58=c

(r= remaining, c= total coffee)

Step-by-step explanation:

Answer:

Step-by-step explanation:

Given:

We can see that:

Since 2² and 5² are perfect squares we get:

[tex]\\ \sf\longmapsto \sqrt{8}+\sqrt{50}[/tex]

[tex]\\ \sf\longmapsto \sqrt{2(2)(2)}+\sqrt{2(5)(5)}[/tex]

[tex]\\ \sf\longmapsto 2\sqrt{2}+5\sqrt{2}[/tex]

[tex]\\ \sf\longmapsto (2+5)\sqrt{2}[/tex]

[tex]\\ \sf\longmapsto 7\sqrt{2}[/tex]

Answer:

D

Step-by-step explanation:

I think its D because you multiple the number that is out of the the bracket with the numerators..

so its

a^4/b^12

Hi ;-)

[tex] \frac{3}{8} + \frac{2}{8} = \frac{3 + 2}{8} = \frac{5}{8} [/tex]

Answer:

[tex] \frac{3}{8} + \frac{2}{8} \\ denomentor \: is \: equal \: so \: we \: can \: add \: it \: \\ \: then \frac{3 + 2}{8} \\ = \frac{5}{8} \\ thank \: you[/tex]

Answer:

5/10

Step-by-step explanation:

for every girl picked a boy is also picked. There are 10 kids so it's a 50% chance it happens

Answer:

50%

Step-by-step explanation:

5/10

*simplify*

1/2

*divide 1 by 2*

0.5

*multiply by 100, or move the decimal twice*

0.5 ---> 5. ---> 50.

50. = 50

so your answer is 50%.

Answer:

158.733 that's the answer

9514 1404 393

Answer:

  about 159 pounds

Step-by-step explanation:

The exact conversion factor from kilograms to pounds is ...

  1 lb = 0.45359237 kg

So, to find the number of pounds, you multiply:

  [tex]72\text{ kg}\times\dfrac{1\text{ lb}}{0.45359237\text{ kg}}\approx\boxed{158.7328\text{ lb}}[/tex]

The conversion is often approximated by 1 kg = 2.2 lb, which gives an answer that is about 0.21% low.

Answer:

A and D

Step-by-step explanation:

Alternate interior angles are the angles formed when a transversal intersects two coplanar lines.

[tex]\\ \rm\Rrightarrow Perimeter=2(L+B)[/tex]

[tex]\\ \rm\Rrightarrow Perimeter=2(2\sqrt{6}+\sqrt{6})[/tex]

[tex]\\ \rm\Rrightarrow Perimeter=2(3\sqrt{6})[/tex]

[tex]\\ \rm\Rrightarrow Perimeter=6\sqrt{6}[/tex]

The perimeter of the rectangle will be 6√6 units.

Let W be the rectangle's width and L its length. The perimeter of the rectangle will be defined as the total length of all of its sides. So the rectangle's perimeter will be given as,

Perimeter of the rectangle = 2(L + W) units

A rectangle has a length of 2√6 and a width of √6. Then the perimeter of the rectangle is given as,

P = 2 (2√6 + √6)

Simplify the equation, then we have

P = 2 (2√6 + √6)

P = 2 (3√6)

P = 6√6 units

The perimeter of the rectangle will be 6√6 units.

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Answer:

100 rows

Step-by-step explanation:

Answer:

Step-by-step explanation:

4(x-3) =16

4x- 12=16

4x=28

8x=56

Answer:

8x = 56

Step-by-step explanation:

Solve for x by isolating it.

Divide both sides by 4

(x-3) = 4

Add 3 to both sides

x = 7

Now plug 7 in for x

8(7) = 56

Answer:

-5/9

Step-by-step explanation:

The exact point at which the lines cuts the axis are unclear so I used the closest round number to substitute into the gradient formula. From the answer I noticed two things

Firstly it was a negative gradient...therefore the second and the fourth option wouldn't work

Secondly (if I were to ignore the operation) the number is less than 1 which would mean that it couldnt be an improper fraction where the numerator is greater than the denominator.

If you take what you notice about both the operation and the size of the number you would find that -5/9 fits the criteria the best and is therefore the answer to your question.

[tex] \frac{y2 - y1}{x2 - x1} \\ = \frac{0 - ( - 1)}{ - 2 - 0} \\ = - \frac{1}{2} [/tex]

Answer:

malai thaxaina