Evaluate the expression when a=7 and c=-7
a-9c

Answer:

14x

Step-by-step explanation:

We just add the bases because they have the same variable terms, (they are like terms)

9 + 5 = 14

14x

7 students in the class can speak more than one language.

Given that,
Total student = 36
For every four students who could only speak one language
For every five students who could only speak one language.
To determine how many students in the class can speak more than one language.

Since,
For every five students who could only speak one language,
= 36 / 5
quotient = 7 ; remainder = 1

Implies that, 7 students in the class can speak more than one language.

Thus, 7 students in the class can speak more than one language.

Learn more about arithmetic here:

brainly.com/question/14753192

#SPJ1

Answer:

pic 1 goes first second pic second slot

Step-by-step explanation:

Answer:

Step-by-step explanation: I'm not sure it's an interesting question I hope you figure it out soon(:  

Answer: x<45.9?

Step-by-step explanation:

25.5+24.3+24.8+23.5=98.1

So (x+98.1)/6<24?

x<45.9?

Answer:

-23

Step-by-step explanation:

Remember Bedmas/Pedmas

P/B = Bractets or parentheses ( )

E = Exponents 3⁵

D = Division ÷

M = Multiply ×

A = Addition

S = Subtract

(4x1)+6-9x3-6

4+6-(9×3)-6

(4+6)-27-6

(10-27)-6

-17-6

-23

The conversion of 7/18 into a decimal number using long division would be 7/18 = 0.39

In this question, we have been given a fraction.

We need to convert given fraction into a decimal number using long division.

Given fraction: 7/ 18

Consider the long division of 18 ÷ 7

      0.388

    _________

18 )  7

    -  0

   __________

       70

     - 54

   __________

       160

     - 144

   __________

       160

     - 144

   ___________

       16...

This means, the 7/18 = 0.3888...

If we round the number 0.3888...  to two decimal places then it would be, 0.39

Therefore, the conversion of 7/18 into a decimal number using long division would be 7/18 = 0.39

Learn more about the fraction here:

https://brainly.com/question/8969674

#SPJ1

Number 7:

-8=x-20

-8+20=x

12=x

Answer:

x = -7

Let the first integer be x.

Given the next two integers are consecutive, it would be: x+1, x+2

The problem states: "4 more than the smaller number plus twice the 3rd number is 7 less than the 2nd number."

Translating English to Algebra, you'll get:

(x + 4) + 2(x + 2) + 7 = x + 1

x + 4 + 2x + 4 + 7 = x + 1

3x + 15 = x + 1

2x = -14

x = -7

That would be the third option.

Answer:

2n² + n

Step-by-step explanation:

Given sequence:

3, 10, 21, 36, ...

Work out the first differences between terms:

[tex]3 \underset{+7}{\longrightarrow} 10 \underset{+11}{\longrightarrow} 21 \underset{+15}{\longrightarrow} 36[/tex]

As the first differences are not the same, work out the second differences.

[tex]7 \underset{+4}{\longrightarrow} 11 \underset{+4}{\longrightarrow} 15[/tex]

As the second differences are the same, the sequence is quadratic and will contain an n² term.

The coefficient of n² is always half of the second difference. Therefore, as the second difference is 4, the coefficient of n² is 2.

To work out the nth term of the sequence, write out the numbers in the sequence 2n² and compare with the given sequence:

[tex]\begin{array}{|l|c|c|c|c|}\cline{1-5} n & 1 & 2 & 3 & 4 \\\cline{1-5} 2n^2 & 2 & 8 & 18 & 32\\\cline{1-5} \sf Operation & +1 & +2& +3& +4\\\cline{1-5} \sf Sequence & 3 & 10 & 21 & 36\\\cline{1-5}\end{array}[/tex]

Therefore, we need to add n to 2n² to match the sequence.

Therefore, the nth term of this sequence is 2n² + n.

Learn more about sequences here:

https://brainly.com/question/27953040

https://brainly.com/question/27775450

Answer:

The graph is provided in the image

The measure of the complement of angle K is (78 - 6x)°. The correct option is D. (78 − 6x)°

From the question, we are to determine the complement of the given angle measure

From the given information, the measure of angle K (m ∠K) is (6x + 12)°

NOTE: If two angles are complementary, the measures of the angles sum up to 90°

Let the complement of angle K be angle L.

Thus,

∠K + ∠L = 90°

(6x + 12)° + ∠L = 90°

6x° + 12° + ∠L = 90°

∠L = 90° - 12° - 6x°

∠L = 78° - 6x°

∠L = (78 - 6x)°

Hence, the measure of the complement of angle K is (78 - 6x)°. The correct option is D. (78 − 6x)°

Learn more on Complementary angles here: https://brainly.com/question/13238306

#SPJ1

Answer-

The cost of one tetra is $2.5 and one rainbow fish is $8.5

Explanation

Let the cost one tetra be 'x';

Cost of rainbow fish = x + 6;

According to question;

8x + 2(x + 6) = 37;

10x = 25

x = $2.5;

the amount or equivalent paid or charged for something : price

The average cost of a university training has gone up dramatically.

the outlay or expenditure (as of attempt or sacrifice) made to acquire an item

He executed repute, but at the fee of dropping numerous buddies.

loss or penalty incurred specially in gaining some thing

the price of lives during war

three

costs plural : charges incurred in a judicial process

particularly : those given by the law or the courtroom to the triumphing party in opposition to the dropping birthday party

To learn more about The cost this, visit: https://brainly.com/question/15637158

#SPJ4

It is false that 5x and 3y are like terms. They can not be combined together through addition.

To learn more about like terms, visit :

https://brainly.com/question/2513478

#SPJ4

Answer:

-8 - (-4) = - 8 + 4

Because negative times a negative is positive

Answer::

:i

Step-by-step explanation:

.

The total number of labels collected by the students in the third month is equal to 525 by the equation 3 x + x = 2100.

Let the number of labels collected in the first two months be 3 x.

We are given that the number of labels collected in the first two months was three times the number of labels collected in the third month.

So, the number of labels collected in the third month = 3 x / 3 = x

Now, we are also given that:

The total number of labels collected by the students at the school = 2100.

So, we get the equation as:

3 x + x = 2100

4 x = 2100

x = 2100 / 4

x = 525 labels.

Therefore, we get that, the total number of labels collected by the students in the third month is equal to 525 by the equation 3 x + x = 2100.

Learn more about equation here:

https://brainly.com/question/1214333

#SPJ9

The new percentage of broth to solution 25/60 is 41.67

Broth, also known as bouillon is a savory liquid made of water in which meat, fish or vegetables have been simmered for a short period of time .It can be eaten alone, but it is most commonly used to prepare other dishes, such as soups.

Commercially prepared liquid broths are available, typically chicken, beef, fish, and vegetable varieties. Dehydrated broth in the form of bouillon cubes were commercialized beginning in the early 20th century.

Broths have been used as a nutrition source for the sick in Great Britain since at least the early 1700s, such as for dysentery patients

Let,

60 represents the 100% of the broth to solution

25 represents the x percentage of the broth to solution

Now,

Solving for the 25 which represents the x percentage of the broth to solution.

25/100 = x/100*

25/60 = x/100*x

25(100) = 60x

x = 2500/60

x = 41.67

Therefore,

25 represents the 41.67 percentage of the broth to solution.

To know more about "Broth"

Refer this link:

https://brainly.com/question/19897107

#SPJ4

Answer:

a) 25/60=x/100

Step-by-step explanation:

The ratio of the patterned circles to plain circles is 6 : 7.

We are given the four arrays of the circles.

In the first array, we have only 1 plain circle.

In the second array, we have 4 patterned circles and 1 plain circle.

In the third array, we have 1 patterned circle and 4 plain circles.

In the fourth array, we have only 1 plain circle.

So, total patterned circles = 5 + 1

Total patterned circles = 6

Total plain circles = 1 + 1 + 4 + 1

Total plain circles = 7

Ratio of patterned circles to plain circles will be given as:

6 : 7

Therefore, we get that, ratio of the patterned circles to plain circles is 6 : 7.

Learn more about ratio here:

https://brainly.com/question/2328454

#SPJ9

Answer:

A postulate is a statement that is assumed true without proof. A theorem is a true statement that can be proven

Step-by-step explanation:

Answer:

Theorems and postulates are statements of geometrical truth.

Explanation:

We create theorems based on postulates.

Postulates are the mathematical statements we assume to be true without any proof while theorems are mathematical statements we can or must prove as true.

--------------------

Hope this helps!

Have a great day and God bless! :)

The answer to the inequality is expressed as x< 1 and x< -4

Inequalities are mathematical expressions having both sides unequal or rather not equivalent to each other.

Given the inequality;

4x (x+3) < -24

First, expand the bracket

4x² + 12x < -  24

Let's turn to quadratic inequality

4x² + 12x - 24 < 0

Factorize further

4 ( x² + 3x - 4) < 0

4 ( x² + 4x - x - 4) < 0

4 ( x(x + 4) - 1 (x + 4) ) < 0

4(x - 1) ( x + 4) < 0

expand the bracket

4x - 4 < 0

x < 1

And

4x + 16 < 0

x < -4

Thus, the answer to the inequality is expressed as x< 1 and x< -4

Learn more about inequalities here:

https://brainly.com/question/25275758

#SPJ1

The expression for r is n(4t-v) and the expression for the width is (P-2l)/2

This is a way of representing a variable with another variable.

Given the expression below:

r/n + t = 4v

Making r the subject

r/n = 4v - t

r =. n(4t-v)

Hence the expression for r is n(4t-v)

For the expression

P = 2l + 2w

P - 2l = 2w

2w = P - 2l

w = (P-2l)/2

Hence the expression for the width is (P-2l)/2

Learn more on subject of the formula here: https://brainly.com/question/21140562

#SPJ1

Answer:

32 or +-8 depending on question

Step-by-step explanation:

If question is 2x = 64, then x= 32

If question is x^2 = 64, then x= +-8

y=47,916.666 dollar after 25 years

librarian salary =25000 dollar in 2000

librarian salary=30500 dollar in 2006

in 6 years increment is 30500 - 25000= 5500dollar

in one year increment is 5500/6= 916.666

m= 916.666 each year

b= 25000

y=mx+b

y=916.666*25+25000      given x=25

y=47,916.666 dollar after 25 years

learn more of linear growth here https://brainly.com/question/22526816

#SPJ9

in that function x would be -2

Answer:from least to greatest:

1) g (x)

2) f (x)

3) h (x)

Step-by-step explanation:

Answer:

For f (x):

f (x) = (x + 3) ^ 2 - 2

For x = -1

f (-1) = (-1 + 3) ^ 2 - 2

f (-1) = (2) ^ 2 - 2

f (-1) = 4 - 2

f (-1) = 2

For x = 3

f (3) = (3 + 3) ^ 2 - 2

f (3) = (6) ^ 2 - 2

f (3) = 36 - 2

f (3) = 34

AVR = ((34) - (2)) / ((3) - (- 1))

AVR = 8

For g (x):

linear graph with and intercept of negative 3 over 2 and x intercept of 3

y = mx + b

b = -3/2

For me we have:

0 = m (3) - 3/2

3m = 3/2

m = 1/2

The function g (x) is:

g (x) = (1/2) x - 3/2

For x = -1

g (-1) = (1/2) (- 1) - 3/2

g (-1) = -1/2 - 3/2

g (-1) = -4/2

g (-1) = -2

For x = 3

g (3) = (1/2) (3) - 3/2

g (3) = 3/2 - 3/2

g (3) = 0

AVR = ((0) - (- 2)) / ((3) - (- 1))

AVR = 1/2

For h (x):

Using the table we have:

AVR = ((62) - (14)) / ((3) - (- 1))

AVR = 12

Step-by-step explanation:

Answer: 27/45

Step-by-step explanation:

[tex]\displaystyle\\\frac{3}{5} =\\\\\frac{3}{5}*1=\\\\ \frac{3}{5}*\frac{9}{9} =\\\\\frac{3*9}{5*9}= \\\\\frac{27}{45}[/tex]

Random assignment means participants have an equal chance of being in the control group or in the experimental group.

Assignment refers to putting people into experimental or control group. In this, the Random assignment involves dividing the participants into two groups through randomization. That is, selection is on random. Tis method provides equal chance for the participants to be in the experimental or control group.

This kind of assignment will be unbiased and the participants in two groups does not differ in any way. So random assignment makes the experiment and control group equivalent. Also this makes the experimental study more accurate, acceptable and scientific too.

Learn more about random assignment at https://brainly.com/question/9423006

#SPJ4

The product of √6 and √12 is option b 6√2.

Given,

Two square roots : √6 and √12

We have to find the product of these square roots:

That is,

√6 × √12

Multiplying square roots:

So here,

Multiply the numbers,

√6 × √12 = 6 × 12 = 72

Now consider the square root of 72

√72 = √36 × √2 = 6√2

That is, the product of the square roots √6 and √12 is 6√2

Learn more about square roots here:

https://brainly.com/question/16818021

#SPJ1