7.5+k=10 7.5+k-7.5=10-7.5 step 1 k=2.5 step 2

find her mistake
a: step 1
b: step 2
c: no mistake

Answer:

10x^2+13x+5

Step-by-step explanation:

(7x^2− 2x + 9) + (3x^2+ 15x − 4)

Combine like terms

(7x^2+3x^2− 2x+  15x + 9 − 4)

10x^2+13x+5

Answer:

[tex]10x^{2} + 13x + 5[/tex]

Step-by-step explanation:

In this equation, you need to add all the like terms. For example, 7x² and 3x² are like terms, since they both are being squared.

First find the like terms:

7x² + 3x²

-2x + 15x

9 - 4

Now simplify the above equations.

7x² and 3x² is equal to 10x². You only have to add the whole number, the exponent stays the same.

-2x + 15x is equal to 13x. Since -2 is negative, you can simply take away two from 15, which is 13, making it 13x.

9 - 4 is equal to 5.

Now add everything together.

[tex]10x^{2} + 13x + 5[/tex]

Your answer is 10x² + 13x + 5.

Answer:

20

Step-by-step explanation:

lets label each shirt as A, B, C, D, E and each pair of pants as a, b, c, d

combinations include:

Aa, Ab, Ac, Ad, Ba, Bb, Bc, Bd, Ca, Cb, Cc, Cd, Da, Db, Dc, Dd, Ea, Eb, Ec, Ed

however, it isn't necessary to write out all the combinations as you could just do 5*4=20.

Answer:

-Z-18

Step-by-step explanation:

-2z+12-30+z

=-z-18

Answer:

Solution,

[tex] - 2(z - 3.2) - 6.5 + z \\ [/tex]

Multiply each term which is inside the round bracket by -2

[tex] - 2z + 6.4 - 6.5 + z[/tex]

Combine the like terms:

[tex] - 2z + z + 6.4 - 6.5[/tex]

Simplify:

[tex] - z - 0.1[/tex]

Hope this helps..

Good luck on your assignment...

Answer:

16?? not sure.......

Answer:

10, -5, -11

Step-by-step explanation:

f(x) = - 3x-5

f(-5) = -3(-5) - 5 => 15 - 5 => 10

f(0) = -3(0) - 5 => 0 - 5 => -5

f(2) = -3(2) - 5 => -6 - 5 => -11

The value of the function at x = –5, 0, 2 will be 10, –5, and –11.

A statement, principle, or policy that creates the link between two variables is known as a function.

The function is given below.

f(x) = –3x – 5

The value of the function at x = –5, 0, 2 will be

f(–5) = –3(–5) – 5

f(–5) = 15 – 5

f(–5) = 10

f(0) = –3(0) – 5

f(0) = 0 – 5

f(0) = –5

f(2) = –3(2) – 5

f(2) = –6 – 5

f(2) = –11

More about the function link is given below.

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Answer:

[tex]\frac{-1}{4}[/tex]and [tex]\frac{-5}{8}[/tex] are the locations higher than [tex]\frac{-3}{4}[/tex] foot

Step-by-step explanation:

We are given that Meg found one treasure at [tex]\frac{-3}{4}[/tex]foot

We are supposed to find Which of these location are higher than [tex]\frac{-3}{4}[/tex]foot?

i) [tex]-\frac{7}{8}[/tex]

So, this location is not  higher than [tex]\frac{-3}{4}[/tex]foot

ii)[tex]-\frac{1}{4}[/tex]

So, [tex]-\frac{1}{4}>\frac{-3}{4}[/tex]

So, this location is higher than[tex]\frac{-3}{4}[/tex] foot

iii) - 1 foot

[tex]-1 < \frac{-3}{4}[/tex]

So,this location is not  higher than[tex]\frac{-3}{4}[/tex]foot

iv)-2 feet

So,this location is not  higher than[tex]\frac{-3}{4}[/tex]foot

v)[tex]\frac{-5}{8}[/tex]

So, this location is higher than [tex]\frac{-3}{4}[/tex]foot

Answer: B, E

Step-by-step explanation:

The guy above is right but just to make it more easy

Answer:

I think A is the MOST supported of all of the options.  The author spends the majority of the writing remarking and complimenting the Queen's strength and desire to be concerned with the people of her land.

A) The author respects and admires qualities in the queen.

Step-by-step explanation:

HOPE THIS HELPED!!  :)

Answer:

8 cubic yards

Step-by-step explanation:

mean>median

mean=11.75

median=11.5

Answer:

C. they are eqwal

Step-by-step explanation:

I took the APE_X quiz

The volume of cone and cylinder are same or equal, so they are equal is correct.

a three dimensional shape can be defined as a solid figure or an object or shape that has three dimensions—length, width, and height.

There are two figures one is cone and other is Cylinder.

The volume of cone can be find by using πr²h/3

r=5, h=6

Volume = π(25)(6)/3

=50π

Now to find volume of cylinder.

h=50 and r=1

Volume =  πr²h

=50π

the volumes are same for both cylinder and cone.

Hence, the volume of cone and cylinder are same or equal, so they are equal is correct.

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Answer:

[tex]3.5725 * 10^5[/tex]

Step-by-step explanation:

Given

There are about 3.5725 * 10^4 grains of sand in an 8-ounce cup.

Required

How many grains of sand would there be in a 5-gallon container?

Let x represent the number of grains in 5 gallon; So, From the question, we have that;

8 cups = 3.5725 * 10^4

5 gallon = x

Cross Multiply

x * 8 cups = 5 gallon * 3.5725 * 10^4

Recall that 1 gallon = 16 cups

[tex]x * 8\ cups = 5 * 16\ cups * 3.5725 * 10^4[/tex]

[tex]x * 8 = 5 * 16 * 3.5725 * 10^4[/tex]

Divide both sides by 8

[tex]\frac{x * 8}{8} = \frac{5 * 16 * 3.5725 * 10^4}{8}[/tex]

[tex]x = \frac{5 * 16 * 3.5725 * 10^4}{8}[/tex]

[tex]x = 5 * 2 * 3.5725 * 10^4[/tex]

[tex]x = 10 * 3.5725 * 10^4[/tex]

[tex]x = 3.5725 * 10^5[/tex]

Hence, the number of grains of sand in  5 gallon is [tex]3.5725 * 10^5[/tex]

Answer:

[tex]X = \begin{bmatrix}1&3\\ 2&4\end{bmatrix}[/tex]

Step-by-step explanation:

The question we have at hand is, in other words,

[tex]\begin{bmatrix}4&2\\ \:1&1\end{bmatrix}\left(X\right)=\begin{bmatrix}8&20\\ \:3&7\end{bmatrix}[/tex] - where we have to solve for the value of [tex]X[/tex]

If we have to isolate [tex]X[/tex] here, then we would have to take the inverse of the following matrix ...

[tex]\begin{bmatrix}4&2\\ \:1&1\end{bmatrix}[/tex] ... so that it should be as follows ... [tex]\begin{bmatrix}4&2\\ \:1&1\end{bmatrix}^{-1}[/tex]

Therefore, we can conclude that the equation as to solve for " [tex]X[/tex] " will be the following,

[tex]X=\begin{bmatrix}4&2\\ 1&1\end{bmatrix}^{-1}\begin{bmatrix}8&20\\ 3&7\end{bmatrix}[/tex] - First find the 2 x 2 matrix inverse of the first portion,

[tex]\begin{bmatrix}4&2\\ 1&1\end{bmatrix}^{-1}[/tex] = [tex]\frac{1}{\det \begin{pmatrix}4&2\\ 1&1\end{pmatrix}}\begin{pmatrix}1&-2\\ -1&4\end{pmatrix}[/tex]= [tex]\frac{1}{2}\begin{bmatrix}1&-2\\ -1&4\end{bmatrix}[/tex] = [tex]\begin{bmatrix}\frac{1}{2}&-1\\ -\frac{1}{2}&2\end{bmatrix}[/tex]

At this point we have to multiply the rows of the first matrix by the rows of the second matrix,

[tex]X = \begin{bmatrix}\frac{1}{2}&-1\\ -\frac{1}{2}&2\end{bmatrix}\begin{bmatrix}8&20\\ 3&7\end{bmatrix}[/tex] ,

[tex]X = \begin{pmatrix}\frac{1}{2}\cdot \:8+\left(-1\right)\cdot \:3&\frac{1}{2}\cdot \:20+\left(-1\right)\cdot \:7\\ \left(-\frac{1}{2}\right)\cdot \:8+2\cdot \:3&\left(-\frac{1}{2}\right)\cdot \:20+2\cdot \:7\end{pmatrix}[/tex] - Simplifying this, we should get ...

[tex]\begin{bmatrix}1&3\\ 2&4\end{bmatrix}[/tex] ... which is our solution.

Answer:

20 times

Step-by-step explanation:

The digit 1 appear in number from 1 to 99 is 20 times

19 times will the digit '1' appear if we write all whole numbers from 1 to 99.

To determine the digit '1' appear if we write all whole numbers from 1 to 99?

From 1 to 9, there is one 1.

From 10 to 19, there are ten 10.

From 20 to 29, there is one 1.

From 30 to 39, there is one 1.

From 40 to 49, there is one 1.

From 50 to 59, there are ten 1.

From 60 to 69, there is one 1.

From 70 to 79, there is one 1.

From 80 to 89, there is one 1.

From 90 to 99, there is one 1.

So the total number of 1s is 1 + 10 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 19.

Therefore, 19 times will the digit '1' appear if we write all whole numbers from 1 to 99.

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Answer:

t and u are parallel lines

 s and t are also parallel lines

Step-by-step explanation:

If two parallel lines are cut by a transversal ,

then in it

pair of alternate angle are equals, similarly vice versa

if pair of alternate angle are equals then lines are parallel

pair of corresponding angles are equal and vice-versa

for example

in the given problem

if line t and u are parallel (note we have assumed this to give example of parallel lines)

then angle 7 and 9 are called alternate angles

pair of angles 5 and 9 are corresponding angles.

________________________________________________

given

∠8 = ∠10 which are alternate angles for line t and u and s is transversal for it,

thus t and u are parallel lines

___________________________

∠1 = ∠3 as they vertically opposite angles

and we know that pair of  vertically opposite angles are equal

given

∠1 = ∠7

thus

∠3 = ∠7

as pair of angles ∠3 and ∠7 are corresponding angles. and are equal and hence line  s and t are also parallel.

Answer:

irrational

5 and 7

Step-by-step explanation:

sqrt( 42) irrational

it is not a perfect square so it is irrational

Looking at perfect squares

6^2 = 36

7^2 = 49

42 is between 36 and 49

so sqrt(42) is between  sqrt(36) and sqrt(49)

sqrt(42) is between 6 and 7

Given the choices, 5 and 7

Answer:

Irrational

5 and 7

Step-by-step explanation:

[tex]\sqrt{42}[/tex] is irrational (Those Roots are usually irrational which cannot be simplified)

=> [tex]\sqrt{42}[/tex]  = 6.48 (Between 5 and 7)

Answer:

( x - 2)^2 + ( y +3) ^2 = 25

Step-by-step explanation:

The center is at (2,-3) and the radius is 5 units

A circle can be written as

( x-h)^2 + (y-k)^2 = r^2 where (h,k) is the center and r is the radius

( x - 2)^2 + ( y - -3) ^2 = 5^2

( x - 2)^2 + ( y +3) ^2 = 25

Answer: v=w-y

Step-by-step explanation:

y+v=w

-y   -y

v=w-y

Answer:

v = w - y

Step-by-step explanation:

y + v = w

To solve for v. We subtract y on both sides.

y + v - y = w - y

v = w - y

The exact values for the intersection point is (20/9, -107/9)

Given the system of equation expressed as;

y = −13x + 17;

y = 5x - 23

Since they are both y-values, we will equate both expressions to have:

-13x + 17 = 5x - 23

-13x - 5x = -23 - 17

-18x = -40

x = 40/18

x = 20/9

Substitute x = 20/9 into equation 2:

y = 5x - 23

y = 5(20/9) - 23

y = 100/9 - 23

y = -107/9

Hence the exact values for the intersection point is (20/9, -107/9)

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Answer:

The answer is 7.5 and 14.5

( 7.5 , 14.5 )

Step-by-step explanation:

Answer:   100 minutes

Step-by-step explanation:

Distance from Dock

130

100

90

90

20

CO

Distance (meters)

Times (minutes)                   The answer is 100 minutes

Answer:

B. After 9 minutes, Sam is 80 meters from the dock

Step-by-step explanation:

truss me folks.

A. [tex]g(x)=4x^2[/tex].

Inserting point [tex](1,4)[/tex] into equality [tex](4=4\cdot1^2)[/tex] results in true.

Hope this helps.

Answer:

c

Step-by-step explanation:

c

Answer:

Rectangular Pyramid

Step-by-step explanation:

It is in the shape of a pyramid with a rectangular base.

Hope this helps :)

Answer:

3x+4x+7

Step-by-step explanation:

First, a Trinomial consists of three terms.

so we have blank+blank+blank

Next we need to add the coefficients.

3+4+blank

Add the variables.

3x+4x+blank

And lastly, add the constant.

3x+4x+7

Good luck!

A trinomial that meets the given criteria is:

p(x) = 3*x^2 + 4*x + 7

A trinomial is a polynomial with 3 terms, we can write it as:

p(x) = A*x^n + B*x^k + C*x^m

Where n, k, and m, can be only natural numbers equal to or larger than zero, and A, B, and C are the coefficients.

First, we know that our trinomial has a constant 7, then one of the exponents must be 0, let's say that m = 0, then C = 7.

p(x) = A*x^n + B*x^k + 7

Now, we know that the other coefficients must be 3 and 4, so we can use:

And there are no more restrictions, so we can use any values for n and k, I will use:

Then the trinomial becomes:

p(x) = 3*x^2 + 4*x + 7

If you want to learn more about polynomials, you can read:

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Answer:

60 words

Step-by-step explanation:

━━━━━━━☆☆━━━━━━━

▹ Answer

a = 4

▹ Step-by-Step Explanation

a + 2 = 6

Subtract 2 from both sides

2 - 2 = crossed out

6 - 2 = 4

Final Answer

a = 4

Hope this helps!

- CloutAnswers ❁

Brainliest is greatly appreciated!

━━━━━━━☆☆━━━━━━━

Answer:

a=4

Step-by-step explanation:

If you are trying to find the value of a, it is simply 6-2. You can also check your answer by seeing if 4, the answer you found can be substituted into the equation while keeping the equation true. 4+2 does equal 6 so you know your right. Hope this helps!! :)

Answer:

1.811

Step-by-step explanation:

3/4 + 1/8 + 4/5 + 17/125=1811/1000 or 1 811/1000 = 1.811

Answer:

The answer is 1.811.

Answer:

(2x+1)(x-3) is the factorized form of the given expression

Step-by-step explanation:

=2x^2-5x-3

By using sum and product rule

=2x^2-6x+1x-3

By taking common

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

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

I hope this will help you :)

Answer:

(x-3)(x+1/2)

_____________________________________

Answer:

see below

Step-by-step explanation:

6+9x^2

Rewriting in decreasing powers of x

9x^2 +0x + 6

ax^2+bx+c

a = 9

b =0

c = 6

Answer: 8 4/5 weeks

Step-by-step explanation:

Let the length of entire trip = 1

Length of trip already traveled = 5/6

Time taken to cover 5/6 length = 7 1/3 weeks

Then;

Length of trip left to cover = (1 - 5/6) = 1/6

Therefore, if (5/6) takes 22/3 weeks

(5/6) = 22/3

1/6 length of the trip = (22/3) ÷ 5

= (22 /3) × (1 / 5)

= 22/ 15 = 1 7/15 weeks

Therefore, length of entire trip ;

(1 / 6) * 6 --------> (22 / 15) × 6

Full length of trip = 132 / 15

Full length of trip = 8 12/15

= 8 4/5 weeks

Answer:

s = 4

Step-by-step explanation:

x is a supplementary angle or 3d angle of the triangle.

(33s - 38) + x = 180 as supplementary angles.

(4s + 43 )+ 35 + x = 180 as angles of the triangle.

(33s - 38) + x = (4s + 43 )+ 35 +x

33s - 38  = 4s + 43 + 35

33s - 4s = 43 + 35 + 38

29s = 116

s = 4