which expression is equivalent to 4(12+5)+3?

Step-by-step explanation:

if I take the expression as you wrote it literally, we have

(-12az2 - 22³) + (-2a³ + 7a²z) - (-4a²z + 8az²) =

= -24az - 10,648 - 2a³ + 7a²z + 4a²z - 8az² =

= -24az - 10,648 - 2a³ + 11a²z - 8az²

yet when I assume that there were several typos particularly in the first bracket, my guess about the real original expression is

(-12az² - 2a³) + (-2a³ + 7a²z) - (-4a²z + 8az²) =

= -12az² - 2a³ - 2a³ + 7a²z + 4a²z - 8az² =

= -20az² - 4a³ + 11a²z

Answer:

7x3

the next number is 336

Step-by-step explanation:

Answer:

3.58

Step-by-step explanation:

hope this helps

Answer:

6.5

Step-by-step explanation:

0.38+0.4=0.78

0.78+0.42=1.2

1.2+0.44=1.64

1.64+0.46=2.1

2.1+0.48=2.58

2.58+0.5=3.08

3.08+5.2=3.6

3.6+0.54=4.14

4.14+0.56=4.7

4.7+0.58=5.28

5.28+0.6= 5.88

5.88+0.62=6.5

Answer:

3

Step-by-step explanation:

it resembles a staircase when graphed

Answer:

12%

Step-by-step explanation:

Add each number of students in the graph together. 1 + 6 + 2 + 3 = 12, so it's 12%.

Percentage of students who responded to the survey is 48 %

What is Percentage?

A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, %

Given data ,

The total number of students in the survey = 25 students

The number of students who played Violin = 1 student

The number of students who played Piano = 6 students

The number of students who played Guitar = 2 students

The number of students who played Drums = 3 students

So ,

Total number of students who played instruments =
Number of students who played Violin + Number of students who played Piano + Number of students who played Guitar + Number of students who played Drums

Total number of students who played instruments = ( 1 + 6 + 2 + 3 )

                                                                                    = 12 students

Now ,

Percentage of students who played the instruments = Percentage of students who responded to the survey

And ,

Percentage of students who responded to the survey =
( Total number of students who played instruments / Total number of students in the survey ) x 100

Percentage of students who responded to the survey = ( 12 / 25 ) x 100

                                                                                          = 12 x 4

                                                                                          = 48 %

Therefore , percentage of students who responded to the survey = 48 %

Hence , percentage of students who responded to the survey is 48 %

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Answer:

17

Step-by-step explanation:

Answer:

TR = 24 units

Step-by-step explanation:

Given 2 secants from an external point to a circle, then

The product of the external part and the whole of one secant is equal to the product  of the external part and whole of the other secant, that is

3x(3x + 5x) = 8(8 + 19)

3x × 8x = 8 × 27

24x² = 216 ( divide both sides by 24 )

x² = 9 ( take the square root of both sides )

x = ± [tex]\sqrt{9}[/tex] = ± 3

but x > 0, thus x = 3

Thus

TR = 8x = 8 × 3 = 24

Answer:

0.06 (6%)

13.31

0.2266

Step-by-step explanation:

1)

Given that :

Probability that it rains on Friday ; P(FR) = 0.8

Probability that it rains on Saturday ; P(SR) = 0.7

P(FR) and P(SR) are independent events

Probability that it does not rain on Friday ; P(FR)' = 1 - P(FR) = 1 - 0.8 = 0.2

Probability that it does not rain on Saturday ; P(SR)' = 1 - P(SR) = 1 - 0.7 = 0.3

Hence, probability that it does not rain on Friday and on Saturday ;

P(FR)' * P(SR)' = 0.2 * 0.3 = 0.06 = 0.06 * 100% = 6%

2)

Given the scores :

82, 73, 61, 97, 83 ;

The sample standard deviation :

Sqrt(Σ(X - m)^2 ÷ n - 1)

n = sample size = 5

m = mean = ΣX / n

m = (82 + 73 + 61 + 97 + 83) / 5 = 79.2

Sqrt((82 - 79.2)^2 + (73 - 79.2)^2 + (61 - 79.2)^2 + (97 - 79.2)^2 + (83 - 79.2)^2) / (5 - 1)

Sqrt(177.2) = 13.311649

Hence, standard deviation = 13.31

3.)

Given that :

Mean(m) = 120

Standard deviation (s) = 20

Probability that randomly taken test taker scores less than 105

P(x < 105)

Obtain the standardized score :

Z = (x - m) / s

Z = (105 - 120) / 20

Z = - 15 / 20

Z = - 0.75

P(Z < - 0.75) = 0.22663 (Z probability calculator)

= 0.2266

Let's solve your equation step-by-step.

Step 1: Simplify both sides of the equation.

Step 2: Subtract 3x from both sides.

Step 3: Subtract 1 from both sides.

Let's solve your equation step-by-step.

1/3 (9x+3)=3x+1

Step 1: Simplify both sides of the equation.

1/3(9x+3)=3x+1

(1/3)(9x)+(1/3)(3)=3x+1(Distribute)

3x+1=3x+1

Step 2: Subtract 3x from both sides.

3x+1−3x=3x+1−3x

1=1

Step 3: Subtract 1 from both sides.

1−1=1−1

0=0

Answer:

All real numbers are solutions.

Answer:

$7.92

Step-by-step explanation:

1 lemon = 2 tbsp = $0.66

1 pie = 1/2 cup

So take 3 x 1/2 = 1 1/2 cups. Now we know that we need 1 1/2 cups of lemon juice. So convert 1 1/2 cups into tbsp and you get 24 tbsp. Now since 1 lemon is equal to 2 tbsp divide the 24 tbsp by 2 and you get 12. This 12 represents the amount of lemons you need to buy. Since 1 lemon is $0.66 take that and multiply it by the amount of lemons you need (12x0.66) now you get $7.92.

You need $7.92 to but 12 lemons to make three 9 inch lemon pies.

I hope this helped :)

The cost to buy enough lemons to make three 9-inch lemon pies,each requiring half a cup of lemon juice is $7.92

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.

1 cup of lemon juice requires around 16 tablespoons of of juice.

1 lemon = 2 tbsp = $0.66

1 pie = 1/2 cup

number of cups = 3 x 1/2 = 1 1/2 cups.

Now we know that we need 1 1/2 cups of lemon juice.  convert 1 1/2 cups into tablespoons and you get 24 tablespoons .

Now since 1 lemon is equal to 2 tbsp divide the 24 tbsp by 2

number of tablespoons = 24/2 = 12.

This represents the amount of lemons you need to buy.

Since 1 lemon is $0.66 take that and multiply it by the amount of lemons number of lemons = (12x0.66) =  $7.92.

WE need $7.92 to but 12 lemons to make three 9 inch lemon pies.

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Answer:m=2570

Step-by-step explanation:2.57kilos= 2570m

Answer:

me

Step-by-step explanation:

Answer:

10%

Step-by-step explanation:

To find the percent that were turkey sandwiches, divide 8 by 80:

8/80

= 0.1

So, 10% were turkey sandwiches

Answer:

[tex]{ \tt{ {2x}^{2} - {3y}^{2} + 2k - 6y + 2 = 0 }} \\ { \tt{ \{x = 3 \: \: and \: \: y = - 2 \}}} \\ { \tt{ {2(3)}^{2} - {3( - 2)}^{2} + 2k - 6( - 2) + 2 = 0}} \\ { \tt{18 - 12 + 2k + 12 + 2 = 0}} \\ { \tt{2k + 20 = 0}} \\ { \tt{2k = - 20}} \\ { \tt{k = - 10}}[/tex]

Answer:

⇒ k=−9

​

Step-by-step explanation:

then put P(−2, 2) and we get,

x

2

−7x+ky=0

(−2)

2

−7(−2)+k(2)=0

⇒ 4+14+2k=0

⇒ 18+2k=0

⇒ 2k=−18

⇒ k=−9

again point Q(3, a) lies on the locus

the, put Q(3, a) and k=−9. We get

x

2

−7x+ky=0

(3)

2

−7(3)+(−9)×a=0

9−21−9a=0

−9a=+12

a=

9

−12

​

a=

3

−4

​

​

Answer:

the answer is 19.50

Step-by-step explanation:

lets start by by reviewing the problem

bonnie withdrew 1200 dollars

she spend 240 on travel agents

then she spends 640 at the hardware store

so if we add all of that up  we get 880

then we will subtract that from the total of her money

=320 left but we aren't finished

then she spend some money on lunch

so we would subtract 320 from

300.50

hence getting

19.50 since

mark me as brainiest!!!!

Answer:

the answer is 19.50

Step-by-step explanation:

Answer:

10g

Step-by-step explanation:

Answer: Man, I agree with u.

Step-by-step explanation:

Answer:

hmm havent noticed

Step-by-step explanation:

ppl are wierd that's why I'm an attack helicopter....

Answer she contributed 8.6

Answer:

2

Step-by-step explanation:

Answer:

162

Step-by-step explanation:

260/2=130

130+32=162

Answer:

-45

Step-by-step explanation:

Because 2 negatives become a positive:

-50-3 + 8 =

-53 + 8 =

-45

Answer:

an acute an angle

Step-by-step explanation:

the angel of 31 is smaller than 90 so that would make it an acute angle

A 31° angle is an acute angle because it measures less than 90 degrees.

An angle is formed when two straight lines or rays meet at a common endpoint.

We know that a right angle is always equal to 90 degrees.

Any angle less than 90 degrees is an acute angle

Any angle greater than 90 degrees is an obtuse angle.

A 31° angle is an acute angle because it measures less than 90 degrees. An acute angle is any angle that measures between 0 and 90 degrees.

Hence, A 31° angle is an acute angle because it measures less than 90 degrees.

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Answer:

A. [tex] y = \frac{1}{4}x + 2 [/tex].

Step-by-step explanation:

Equation of a line in slope-intercept form, is given as [tex] y = mx + b [/tex].

Given a slope (m) of ¼, and y-intercept (b) of 2, we can get the equation if the line by substituting m = ¼, and b = 2 into [tex] y = mx + b [/tex].

Thus, the equation of the line would be:

[tex] y = \frac{1}{4}x + 2 [/tex].

Answer:

im answering for points

Step-by-step explanation:

sorry people who wanna answer

Answer:

143.25

Step-by-step explanation:

First, you know that 95.50 is an hour well it's 1 hour and 30 minutes( because 1 is the hour and the 5 is half of ten so the 5 would equal 30) so 95.50 divided into 2 is 47.75 so 95.50+47.75=143.25

Answer: 143.25

Step-by-step explanation:

The expected returns is 33.7% and the standard deviations of returns is 38.73%.

In statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values.

Now given probabilities are,

probabilities P = 0.15, 0.34, 0.44, 0.67, 0.2 and 0.15

Given returns on the probabilities,

returns r = 50%, 39%, -4%, 20%, -25%, and 42%

So, Expected rate of returns = ∑Pr

⇒ Expected rate of returns = 0.15(50) + 0.34(39) + 0.44(-4) + 0.67(20) + 0.2(-25) + 0.15(42)

⇒ Expected rate of returns = 7.5 + 13.26 - 1.76 + 13.4 - 5 + 6.3

⇒ Expected rate of returns = 33.7%

Now standard deviation S is,

Square root of the difference squared between each value and the mean, multiplied by the probability.

S = √{0.15(50 - 33.7)² + 0.34(39 - 33.7)² + 0.44(-4 - 33.7)² + 0.67(20 - 33.7)² + 0.2(-25 - 33.7)² + 0.15(42 - 33.7)²}

⇒ S  = √{0.15(16.3)² + 0.34(5.3)² + 0.44(-37.7)² + 0.67( - 13.7)² + 0.2(-58.7)² + 0.15(8.3)²}

⇒ S  = √{0.15(265.69)+ 0.34(28.09) + 0.44(1421.29) + 0.67( - 187.69) + 0.2(3445.69)²\ + 0.15(68.89)}

⇒ S  = √{39.85 + 9.55 + 625.36 + 125.75 + 689.13 + 10.33}

⇒ S  = √{1499.97}

⇒ S  = 38.73%

Thus, the expected returns is 33.7% and the standard deviations of returns is 38.73%.

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