what is 3(x^2+2x-3)-4(4x^2-7x+5) equal to show step by step explanation

Answer: $18.19

Step-by-step explanation:

The tax is applied after the discount so first find the discounted price:

= Price * ( 1 - discount rate)

= 20 * ( 1 - 15%)

= $17

The sales tax of 7% can then be applied:

= Price * ( 1 + tax rate)

= 17 * ( 1 + 7%)

= $18.19

Answer:

25

Step-by-step explanation:

22-6=16

16+9+25

Answer:

C) 4.0 ft  

Step-by-step explanation:

We will use the Pythagorean theorem to solve this.  It states that the sum of the squares of the legs of a right triangle is equal to the square of the hypotenuse; algebraically,

a²+b² = c²

The height splits the base in two, giving us a leg of 3.  The hypotenuse is 5.  This gives us:

3²+b² = 5²

9+b² = 25

Subtract 9 from each side:

9+b²-9 = 25-9

b² = 16

Take the square root of each side:

√b² = √16 = 4

Answer:

[tex]\displaystyle 9[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

[tex]\displaystyle 8 + (7 + 1)^2 \div 4 \cdot (\frac{1}{2})^4[/tex]

Step 2: Evaluate

Answer:

an hour.

Step-by-step explanation:

if you subtract 24 by 36 you get 12 then times that by 5 so you get 60. 60 minutes is an hour.

hope this helps!!

Answer:

yes

Step-by-step explanation:

yes because the large bottle has 42ml more than the small bottle

Answer:

B) [tex]\displaystyle \frac{9}{12}[/tex]

Step-by-step explanation:

I recall saying that shared indicates division, therefore you have your answer.

I am joyous to assist you at any time.

** [tex]\displaystyle \frac{3}{4} = \frac{9}{12}[/tex]

Answer:

2

Step-by-step explanation:

f = a

48 = 3

32 = x

48x= 98

x=2

Answer:

The mean temperature for the first 8 days in January is 5.375 °C

Step-by-step explanation:

The means = The sum ÷ The number

∵ The mean temperature for the first 7 days in January was 5 °C

∴ The mean = 5

∴ The number = 7

→ Substitute them in the rule above

∵ 5 = The sum ÷ 7

→ Multiply both sides by 7

∴ 35 = The sum

∴ The sum of the temperature for the first 7 days is 35 °C

∵ The temperature on the 8th day was 8 °C

→ Add it to the sum of the first 7 days to find the sum of the first 8 days

∴ The sum of the first 8 days = 35 + 8

∴ The sum of the first 8 days = 43 °C

∵ The number of days = 8

→ Substitute them in the rule above to find the mean

∴ The mean = 43 ÷ 8

∴ The mean = 5.375 °C

∴ The mean temperature for the first 8 days in January is 5.375 °C

Answer:

She reads 5 books per month! :)

Step-by-step explanation:

10 divided by 2 is 5

Hope you do Great!!

Answer:

360 degrees around a point

vertically opposite angle opposite 51 degrees given will be 51 degrees

360- 102= 258

258/2 ( because these will be same as vertically opposite also) = 129

X = 129 degrees

Answer:

5 cans

Step-by-step explanation:

if each can is 2 dollars then you can divide that amongst 10 dollars to find that you can buy 5 cans

The number of cans you can buy for $2 is 5.

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value. Unitary method a technique by which we find the value of a single unit from the value of multiple devices and the value of more than one unit from the value of a single unit. It is a method that we use for most of the calculations in math.

We are given that You can buy one can of pineapple chunks for $2

We need to Find out how many can you buy with $10

Let x be the number of cans

Using proportion;

1/2 = x/10

x = 10/2

x =5

Hence, the answer is 5 cans.

Learn more about the unitary method, please visit the link given below;

https://brainly.com/question/23423168

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Answer:

The answer is B. $3.85.

Step-by-step explanation:

This is because, first if we get the percentage that the shoes were marked up by, we get that they were marked up to $35, because 40% of $25 is $10 and $25 + $10 = $35.

Then, we find the percentage of $35 that she earned. In order to do this, we see what 11% of $35 is. We get $3.85, because 10% of $35 is $3.50, and 1% of $35 is $0.35. $3.50 + $0.35 = $3.85.

This is why the answer is B. $3.85.

Answer:

$6.88

Step-by-step explanation:

0.11(25/0.4)

0.11(62.5)

$6.88

Answer:

d = 3√2

Step-by-step explanation:

find the constant of variation ('k'):  F = k/d²

16 = k/3²

16 = k/9

k = 144

8 = 144/d²

d² = 144/8

d² = 18

d = √9 · √2

d = 3√2

Answer: hi want to be fwends

Step-by-step explanation:

There can 3 songs to be played for per quarter.

A unit conversion expresses the same property as a different unit of measurement.

Given that, It cost Sean 3.75 to play 45 songs on an old jukebox. The jukebox only accepts quarters.

Converting $3.75 into quarters,  ($1 = 4 quarters)

$3.75 = 3+0.75

= 3x4+0.75

= 12+3

= 15 quarters

So, he played 45 songs in 15 quarters

Therefore, in 1 quarters = 45/15

= 3

Hence, There can 3 songs to be played for per quarter.

For more references on unit conversion, click;

https://brainly.com/question/19420601

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Answer:

30 sweets

Step-by-step explanation:

From the above question

The ratio is given as:

Karan : Preeti

2:3

The sum of the proportion = 2 + 3 = 5

Total number of sweets = 50 sweets

The number of sweets Preeti will get is calculated as:

3/5 × 50 sweets

= 30 Sweets

Therefore, the number of sweets Preeti will get is 30 sweets

Answer:

y = 68 degrees

Step-by-step explanation:

Here, we want to solve for an equilateral triangle with the internal angle measurement being y-8

If one of the angles is y-8, then the rest are y-8 too

mathematically, by adding all , we have a total of 180

Thus;

3(y-8) = 180

y-8 = 180/3

y-8 = 60

y = 60+8

y = 68 degrees

Answer:

Step-by-step explanation:

Step-by-step explanation:

Given

Total spending =$230

The cost of the skirt  is $15

The Cost of the shirt  is $10

Suppose she buys x skirts and y shirts

So, sum of the spending on skirts and shirts must be less than or equal to the $230

[tex]15x+10y\leq230[/tex]

Answer:

3 1/13 hours

Step-by-step explanation:

hope it helps

Answer:

3rd one y=2x

Step-by-step explanation:

because they are saying how many minutes can you read 2 pages so it would be 2 times x and x is the 4 minutes

Answer:

-11, -10, -9, -8, -7, -6 and -5

Step-by-step explanation:

Given the inequality expressions

2x+9<0  and x>-12

2x+9<0

2x< 0-9

2x < -9

x < -9/2

x < -4.5

Since x >-12

-12 < x

Combining both inequalities

-12 <x  < 4.5

The integers between the intervals are -11, -10, -9, -8, -7, -6 and -5

Answer: B. 12 and 64

Step-by-step explanation:

Option A is incorrect because the highest common factor for both numbers would be 38 not 4.

Option B:

Factors of 12 are: 1, 2 , 3, 4, 6, 12

Factors of 64 are: 1, 2, 4, 8, 16, 32 and 64.

Highest factor of both is 4 and they both add up to 76 so option B must be correct.

Answer:

12 and 64 !

Step-by-step explanation:

Answer:

a = -66

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Step-by-step explanation:

Step 1: Define

13 + a/11 = 7

Step 2: Solve for a

Step 3: Check

Plug in a into the original equation to verify it's a solution.

Here we see that 7 does indeed equal 7.

∴ a = -66 is the solution to the equation.

Answer:

If you mean [tex]\frac{13+a}{7}=7[/tex] then the answer is [tex]a=36[/tex].

If you mean [tex]13+\frac{a}{7} =7[/tex] then the answer is [tex]a=-42[/tex].

Step-by-step explanation:

To do this question, you simplify both sides of the equation and then isolate the variable.

Answer:

B

Step-by-step explanation:

Answer:

its B I TOOK TEST

Step-by-step explanation:

Answer:

-2+2x

Step-by-step explanation: