21+17·2−15+1 plz answer

Answer:

x = -8

Step-by-step explanation:

[tex]7(x + 3) + 9 = 5(x - 2) - 3x\\\\\mathrm{Expand\:}7\left(x+3\right)+9:\quad 7x+30\\\\\mathrm{Expand\:}5\left(x-2\right)-3x:\quad 2x-10\\7x+30=2x-10\\\\\mathrm{Subtract\:}30\mathrm{\:from\:both\:sides}\\7x+30-30=2x-10-30\\\\Simplify\\7x=2x-40\\\\\mathrm{Subtract\:}2x\mathrm{\:from\:both\:sides}\\7x-2x=2x-40-2x\\\\Simplify\\5x =-40\\\\Divide both sides by 5\\\frac{5x}{5}=\frac{-40}{5}\\\\Simplify\\x = -8[/tex]

Answer:

1989.674m³

Step-by-step explanation:

It’s difficult to see the picture, and I can’t read the question.  Are you looking for the volume of the composite shape?  If so:

Cylinder: V=[tex]\pi[/tex]r²h =

Cone: V=[tex]\pi[/tex]r²h/3 =

Hemisphere: V=2/3[tex]\pi[/tex]r³ = 2/3

TOTAL: 1570.796+157.079+261.799=1989.674m³

I hope this helps you

Answer: Option 2. x≥-78

Step-by-step explanation:

(x/-6)+2≤15

     x/-6≤13

         x≥-78 ⇔ REMEMBER you need to change the direction of the sign    

                         when you multiply/divide a negative number

Option 2. x≥-78

Hope this helps!! :)

Please let me know if you have any question

Answer:

A = C-B

Step-by-step explanation:

A+B=C

Subtract B from each side

A+B-B=C-B

A = C-B

Answer:

189.571428571 miles or km

Step-by-step explanation:

Just deduct the last odometer reading with the first one and divide by the number of days,

(11,477-10,150)/7 = 189.571428571

Answer:

47p

Step-by-step explanation:

Since both have coefficients times the same variable we can combine like terms

72p-25p

(72-25)p

47p

Answer:

t =2654.01465 year

Step-by-step explanation:

Given that the​ half-life of​ carbon-14 is 5600 years and if a piece of charcoal made from the wood of a tree shows only 72% of the​ carbon-14 expected in living​ matter.

we know

[tex]y=a(b)^{t/h}[/tex]

where y= final amount

a= initial amount

b= growth/decay

t= time elapsed

h= half time

plugging the values we get

[tex]0.72 =(\frac{1}{2})^{t/5600}\\[/tex]

taking log on both side

log 0.72 = t/5600 log(1/2)

solving we get t =2654.01465 year

Answer:

b.) To estimate the mean number of classes that students take at his university, Samuel collects data from a  randomly selected proportionate number of students from each grade level.

c.) David wants to estimate the mean grade point average of students at his school. He collects data by recording the grade point average of every 25th student on the list of students after a randomly selected first student.

d.) Helen wants to estimate the male to female ratio of the residents of her city. She collects data by recording the sex  of every 50th resident after selecting a random starting point on a list of residents.

Why? Because a sample is only biased if some individuals of the population are more or less likely to be chosen than others.

The sample from choice B isn't biased because every student has the same opportunity of being selected. It's the same predicament with choice C; it's also non-biased because again, each student has a chance of being in it, there is no preference.

And finally, the sample from option D is non-biased, because every resident that is being selected has an equally fair chance of being selected at random.

Hope this helps ;)

Answer:

Step-by-step explanation:

To estimate the mean number of classes that students take at his university, Samuel collects data from a randomly selected proportionate number of students from each grade level.

David wants to estimate the mean grade point average of students at his school. He collects data by recording the grade point average of every 25th student on the list of students after a randomly selecting first student.

Helen wants to estimate the male to female ratio of the residents of her city. She collects data by recording the sex of every 50th resident after selecting a random starting point on a list of residents.

Answer:

See Explanation

Step-by-step explanation:

We start by writing a real world problem

The cost of a pack of candle and a dozen of eggs is $12.5 and $11.3 respectively. If Ridwan intends to buy 2 dozen eggs and half pack of a candle, what should be Ridwan's budget.

Next; is to solve the above problem

We continue by listing out the given parameters

A pack of candle = $12.5

A dozen of egg = $11.3

Required

What is the cost of 2 dozen egg and half pack of candle?

We start by calculating the cost of 2 dozen egg

[tex]Cost = 2 * 1\ dozen\ egg[/tex]

[tex]Cost = 2 * \$11.3[/tex]

[tex]Cost = \$22.6[/tex]

Then, we calculate the cost of half pack of Candle

[tex]Cost = \frac{1}{2} * 1\ pack\ of\ candle[/tex]

[tex]Cost = \frac{1}{2} * \$12.5[/tex]

[tex]Cost = \$6.25[/tex]

Lastly, we add up the two costs;

[tex]Total = \$22.6 + \$6.25[/tex]

[tex]Total = \$28.85[/tex]

Answer:

Step-by-step explanation:

[tex]18\: girls \\ 27 \:boys\\\\Girls\:: Boys\\18 \: \:\:\:\:\:\:: 27\\\\Use\:3\:to\:divide\:through\\6:9 = 2:3\\[/tex]

Answer:

3,4,5 is the Pythagorean triplet

Step-by-step explanation:

A pythagorean triplet is when you have 3 consecutive numbers (for example 1,2,3 or 9,10,11). So since they've already given one of the numbers you can try doing trial and error to find out(use different combinations like 3,4,5 or 4,5,6) and see whether the Pythagoras theorem applies to it.

Answer:

None of the options seem to be equivalent to 1/8 but A, B, and C all are equivalent.

Step-by-step explanation:

Let's simplify each fraction as much as possible.

A:

2/14 = 1/7

B:

4/28 = 1/7

C:

5/35 = 1/7

D:

2/8 = 1/4

E:

7/49 = 1/7

F:

7/40 (cannot be further simplified)

I think you may have a typo in your question as there are no answers. However if the question is asking for 1/7, the answers are A, B, C, E.

Answer:

The answer is 3.5

Step-by-step explanation:

I just got it right on the instruction.

Answer:

v=-143

Step-by-step explanation:

45-v=188

-v=188-45

-v=143

v=-143

Answer:

Step-by-step explanation:

45 - v = 188

-v = 188 - 45

-v = 143

v = -143

Answer:

7.5r minutes

Step-by-step explanation:

480 divided by 64 = 7.5

Answer:

It would be B. Fuction 1 has the larger maximum at (4,1)

Step-by-step explanation:

because the maximum point for Fuction 1 is at (4,1) becuase that the highest point/vertex it goes.

You can use a graph to identify the vertex or you can find the minimum or maximum value algebraically by using the formula x = -b / 2a. This formula will give you the x-coordinate of the vertex. Simply replace the x in your original equation with the value of the x-coordinate and then solve for y.

Answer:

It would be B. Fuction 1 has the larger maximum at (4,1)  because the maximum point for Fuction 1 is at (4,1) becuase that the highest point/vertex it goes.

Step-by-step explanation:

Answer:

21

Step-by-step explanation:

3 (7) - 2(4) + 8

21 - 8 + 8

13 + 8

21

Answer:

21

Step-by-step explanation:

3k - 2c + 8

k = 7 and c = 4

Substitute the values of k and c in the algebraic expression

3(7) - 2(4) + 8 = 21 - 8 + 8 = 21

Answer:

5 scoops

Step-by-step explanation:

Given

[tex]Feeder = 4\frac{1}{2}[/tex]

[tex]Scoop = \frac{9}{10}[/tex]

Required

Determine the number of scoop in a feeder

To do this, we simply divide the size of the feeder by the size of the scoop as follows;

[tex]Number = \frac{Feeder}{Scoop}[/tex]

[tex]Number = 4\frac{1}{2}/\frac{9}{10}[/tex]

Convert Fractions to improper

[tex]Number = \frac{9}{2}/\frac{9}{10}[/tex]

[tex]Number = \frac{9}{2}*\frac{10}{9}[/tex]

[tex]Number = \frac{9 * 10}{2 * 9}[/tex]

[tex]Number = \frac{90}{18}[/tex]

[tex]Number = 5[/tex]

Hence, there are 5 scoops in a feeder

Answer:

A. $1572

Step-by-step explanation:

Saturday and Sunday Base Salary: 140+140 = 280

Subtract Base Salary: 500-280 = 220

Find Percent: (220/14)* x 100 = 1571.43

Round up: 1572

Answer:

A. $1,572

Step-by-step explanation:

She earns $140 per day as her base salary.

And she earns 14% of her daily sales for both days.

So 280 + 1, 292 = 1,572!

Hope dis helps! :P

- Anna

Answer:

C. 12÷4= 3 is correct

as in the question 4 students can sit on one bench than 4×3=12 which is equal to the total number of students in class.

Step-by-step explanation:

hope it will help ^_^

3 bench are needed for all students

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value

We have

Students in the gym = 12

how many students can sit in 1 bench = 4

Based on the given conditions formulate:

12 ÷ 4 = 3

Hence , 3 bench are needed for all students and option C is correct.

learn more about unitary problem from here

https://brainly.com/question/21626677

#SPJ2

I hope this helps you

(3+19)+(4i-5i)

22-i

Answer:

y = 30

Step-by-step explanation:

y ∝ 1/x

y = k/x     →         y = 60/x

12 = k/5               y = 60/2

60 = k                 y = 30

I hope this helped you :)

If [tex]y=\frac{x}{2}+1[/tex] then [tex]y_{\perp}=-2x+1[/tex].

The slope in first line is [tex]1/2=0.5[/tex], therefore the slope of perpendicular line must be [tex]-1/0.5=-2[/tex].

Hope this helps.

Answer:

75%

Step-by-step explanation:

let the unknown percent be x.

[tex]\frac{x}{100}*96=72\\\frac{96x}{100}=72\\ 96x=72*100\\96x=7200\\\frac{96x}{96}=\frac{7200}{96}\\ x=75%[/tex]

Answer:

Step-by-step explanation:

x/100 * 96 = 72

96x = 7200

x = 75

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

Explanation:

1.5 liters of orange juice

7.5 liters of lemonade

1.5+7.5 = 9 liters total

1.5/9 = 15/90 is the fractional amount of orange juice. Note how I multiplied top and bottom of the first fraction by 10 to get 15/90. This is the same as moving the decimal point 1 spot to the right for each value.

----------

From here you divide both parts by the GCF 15 to reduce

15/15 = 1

90/15 = 6

Meaning 15/90 = 1/6

So 1/6 of the drink is orange juice.

Answer:

16.8 cubic centimeter

Step-by-step explanation:

Dimensions of rectangular prism are:

[tex]4\ cm, 3\ cm , 1.4\ cm[/tex]

To find:

The volume of rectangular prism in cubic cm ?

Solution:

The formula for volume of prism is given as:

[tex]V=l\times w\times h[/tex]

Where [tex]l[/tex] is the length of rectangular prism

[tex]w[/tex] is the width of rectangular prism

[tex]h[/tex] is the height of rectangular prism

Here we are given the three dimensions of prism as:

Length, [tex]l[/tex] = 4 cm

Width, [tex]w[/tex] = 3 cm

Height, [tex]h[/tex] = 1.4 cm

Putting the values in formula for volume:

[tex]V=4\times 3\times 1.4\\\Rightarrow \bold{V =16.8\ cm^3}[/tex]

So, volume is 16.8 cubic centimeter.

Answer:

16.8

Step-by-step explanation

(4 cm times 3 cm) = 12 cm times 1.4 = 16.8

hope i got it correct :)

Answer:

82

Step-by-step explanation:

plug in and multiply

Answer:

Step-by-step explanation:

8x + 2 + 4y

Let x = 9 and y = 2

8*9 + 2 + 4*2

72 + 2+ 8

82

-53

Step-by-step explanation:

[tex] \frac{( { - 8)}^{2} }{5 - 9} - ( - 1)^2 + 4( - 9) \\ = \frac{64}{ - 4} - 1 - 36 \\ = - 16 - 1 - 36 \\ = - 52 - 1 \\ = - 53[/tex]