Justin is evaluating the expression 12.5 + 3.8 x, when x is 7.9.

12.5 + 3.8 (7.9). 16.3 (7.9). 128.77.

What was Justin’s error?
Justin should have multiplied 12.5 and 7.9 first.
Justin should have added 12.5 and 7.9 first.
Justin should have multiplied 3.8 and 7.9 first.
Justin should have added 3.8 and 7.9 first.

Answers

Answer 1

Answer:

Justin should have multiplied 3.8 and 7.9 first

Step-by-step explanation:

Multiply before adding

12.5 +3.8(x)x

12.5+3.8x7.9

Answer 2

Answer:Justin should have multiplied 3.8 and 7.9 first

Step-by-step explanation:


Related Questions

600/b=74/100 HELP ASAP PLEASE!

Answers

Answer:

Step-by-step explanation:

Cross multiply,

74* b = 600 * 100

74b = 60000

b = 60000/74 = 810.8

PLEASE HELP ON THIS PLEASE I REALLY NEED HELP

Answers

Answer:

21.07 ft²

Step-by-step explanation:

Radius = 7

Length of the rectangle = 2 * 7 = 14 ft

Area of rectangle = 14 * 7 = 98 ft²

Area of semicircle = π(7)²/2 = 76.93 ft²

So the are of shaded region = 98 - 76.93 = 21.07 ft²

When coverting centimeters to inches,do you multiply or divide by 2.54?Explain. If someone Explains and gets it correct tell me and i will make a question called i eat apple pie and i give them 85 points

Answers

Answer:

Divide by 2.54

Step-by-step explanation:

Because a centimeter is smaller than an inch, you have to divide by 2.54 when converting from cm to inches.

Ian owns a small business selling used books. He knows that in the last week 19
customers paid cash, 30 customers used a debit card, and 77 customers used a credit
card.
If next week, he is expecting 1800 customers, about how many would you expect to
pay with a credit card? Round your answer to the nearest whole number.

Answers

Step-by-step explanation:

last week there were 19+30+77 = 126 customers.

19/126 = 1/14 paid cash.

30/126 = 5/21 paid by debit card.

77/126 = 11/18 paid by credit card.

next week he expects 1800 customers.

that is compared to 126 a factor of

1800/126 = 300/21 = 100/7

now we actually only need to apply the same factor to any part of the total sum to get their share in the new total sum.

it simply follows the rule

(a + b + c) × d = ad + bd + cd

so,

77 × 100/7 = 11 × 100 = 1100 customers are expected to pay per credit card.

Help please...............

Answers

The scale factor is 8

Aldo rented a truck for one day. There was a base fee of $18.95, and there was an additional charge of 87 cents for each mile driven. Aldo had to pay $183.38 when he returned the truck. For how many miles did he drive the truck?

Answers

Answer:

about 198 miles

Step-by-step explanation:

183.38

- 18.95

_______

164.45 divided by .87 is 198.0229885057

The formula c(x) = 0.45 +0.2(x - 1) can be used to find the cost of mailing a letter that
weighs 2 ounces or more. Find the formula for
c'(x)

Answers

Answer:

Step-by-step explanation:

Remark.

I take it that this is a calculus question question.

Expand c(x)

c(x) = 0.45 + 0.2x - 0.2        Combine

c(x) = 0.25 + 0.2x/dx

c(x) =  0.2

Pls help me …….I really need help

Answers

Answer:

The least common denominator for 1/3 and 5/11 is 33, and the least common denominator for 4/5 and 1/6 is 30! Hope this helps.

Step-by-step explanation:

One year the population of the city was 117000 serval years later it was 136,90 find the percent increase

Answers

Answer:

17%

Step-by-step explanation:

The initial value was 117,000

the final value was 136,900 i assume and not 136,90 like you had typed.

Does anyone know this?

Answers

33/65

sine = “opposite”/hypotenuse

Unfortunately, I currently can’t draw a diagram, but if you draw a right triangle with corners labeled I, H, and G, the side opposite to angle G is 33. The hypotenuse, aka the longest side of the triangle, is 65.

Hence, the ratio would be 33/65.

What is the percent of the numbers 12% of 85

Answers

Answer:

Step-by-step explanation:

12% of 85 =x                Change the % to a fraction

12/100 * 85 =  x            Divide 100 into 85

12 * 0.85 = x                 Multiply by 12

10.2 = x

2. You are called to a crime scene and need to get there as quickly as possible. The crime scene is 10.5 miles away.
You will be able to drive an average of 45 miles per hour. Approximately how long will it take you to get to the
scene?
A. 5 minutes
B. 10 minutes
C. 5 minutes
D. 14 minutes

Answers

The time taken to reach the scene is 14 minutes, the correct option is D.

What is Speed?

Speed is the rate at which a certain distance is covered in a given period of time, it is represented in m/sec, km/hr, etc.

The distance is 10.5 miles

The speed of driving is 45 miles/ hour

Time period = ?

Let t denotes the time taken to reach

Speed =  Distance / Time

45 = 10.5 / t

t = 10.5/45 = 0.233 hours

t = 0.233 *60 = 14 minutes

Therefore, the time taken to reach the scene is 14 minutes, the correct option is D.

To know more about Speed

https://brainly.com/question/7359669

#SPJ2

Tyra's family is spending the afternoon in Millersville. They plan to see a movie and
then explore the town. The movie will cost the family $36, and parking costs $4 per
hour.
How long will the family be able to spend in Millersville if they want to spend less
than $60 and they don't have any other expenses?

Answers

Answer:

Step-by-step explanation:

Let the family spent 'x' hours in the town.

Parking cost for 'x'hours = 4*x = 4x

Now the total amount = Cost of the movie ticket + parking cost

                                    = 36 + 4x

Total cost should be less than $ 60

36 + 4x < 60

Subtract 36 from both sides

4x < 60 - 36

4x < 24

Divide both sides by 4

x < 24/4

x < 6

The family can spend less than 6 hours in the town.

ILL GIVEE POINTS PLEASE HELP

Answers

Answer:

Denominators

Step-by-step explanation:

a. 4

b. 7

c. 3

d. 3

Just divide the denominator of the fractions

The product of y and 9 is at most -18.

Answers

Answer:

y = -2

Step-by-step explanation:

Y × 9 = -18

Y = -18 / 9

Y = -2

The Downtown Community Barbecue served 363 dinners. A child’s plate cost $4.20 and an adult’s plate cost $9.00. A total of $2,681.40 was collected. How many of each type of plate was served?

Answers

Answer:

there were 223 child plates and 149 adult plates

Step-by-step explanation:

There were 223 child plates.

Since there were a total of 372 plates, there will be 149 adult plates (223 + 149 = 372)

To verify, the total amount raised would be $2121.50:

3.50c + 9a = 2121.50

3.50*223 + 9*149 = 780.50 + 1341.00= $2121.50

The number of the child’s plate and adults plate were served is 125 and 155

Ben says the measure of the angle is
50
°
, but Jeff says it is
130
°
.

Who is correct, Ben or Jeff? Explain your reasoning for your answer.

Answers

Ben is correct because acute angles cannot be bigger than 90

Answer:

Ben

Step-by-step explanation:

Ben is correct. because you have  to start 0° from right hand side.

320 percent of 360 is what ?

Answers

Answer:

Step-by-step explanation:

320% 360 = ?

320/100 * 360 =

3.2*360 = 1152


If A and B are independent events with P(A) = 0.4 and P(B) = 0.6, find P(A AND B).

Answers

Answer:

= 0.25

Step-by-step explanation:

p (A)= 0.4

P (B)= 0.6

P (A and B) = P (A) × P (B)

= ( 0.4 × 0.6 )

= 0.25

N:2 = 15/5 solve it for n

Answers

Step-by-step explanation:

N:2 = 15:5

N\2 = 15\ 5

Now cross multiply,

5N = 30

N = 6

Answer:

n = 6

Step-by-step explanation:

N:2 = 15/5 solve it for n

n : 2 = 15 : 5

n = 2 * 15 : 5

n = 30 : 5

n = 6

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

check

6 : 2 = 15 : 5

3 = 3

the answer is good

The distance Charles c runs one day is increased by two. If he runs that new distance three times, write an expression to represent the distance Charles ran.

Answers

Answer:

3c-6

Step-by-step explanation:

One day is c-2 so we need to multiply by 3. We get 3(c-2) or 3c-6.

Tip: use the variables/numbers in the problem to form an equation. Then, simplify.

79 5/6% as a fraction

Answers

Can you rephrase the question so I can better understand cause

5/6 is already a fraction as in 5 over 6 so I'm not sure how to answer

The width of a vegetable garden is į times its length.
If the length of the garden is 7 feet, what is the width
in simplest form?

Answers

Answer:

I guess it's 6 but I'm not really sure about my answer

A ______ expression like ( 3+5) × (4-1) is a combination of numbers and at least one operation. Fill in the blank

Answers

The answer is C it’s always C

Which inequality matches the graph shown below? y < -2x-1, y > -2x-1, y > 2x-1, y < 2x-1

Answers

Answer:

y > 2x - 1

Step-by-step explanation:

the first thing we see in the graph is the dotted line. so, the line itself will not be included. therefore, no "<=" or ">=", but there was none in the answer options anyway.

then we see the shaded area is "above" (in tendency) the line. so, we are talking about a "y > ..." inequality.

then we see the y-intercept (the y value when x=0). it is -1, but all the answer options have "-1" as y-intercept. OK.

and then we see the slope of the line. when checking after (0, -1) the next point on the line with whole numbers as coordinates, we find (1, 1). so, while x increased by 1, y increases by 2. so, the slow is "y change"/"x change" = 2/1 = 2

so, in total, we are looking for the line

y = 2x - 1

and to cover the whole area above the line (but without the line) we get then

y > 2x - 1

Write a word expression for the problem using math vocabulary.

6k + 23

Answers

Hello.

First, we have a number k multiplied by 6, so we write

6 times a number k

or

6 times k

Now, we also add 23.

We can write it as

the product of 6 and k plus 23

or

6 times k plus 23

I hope it helps.

Have a nice day.

[tex]\boxed{imperturbability}[/tex]

please help me please

Answers

Answer:

24.123

Step-by-step explanation:

Simplify  6.7 + 3  to  9.7

9.7 + 9.863 + 4.56

Simplify  9.7 + 9.863   to  19.563

19.563 + 4.56

Simplify

24.123

Draw line segment PT so that it divides OPQ into two smaller parts

Answers

I can’t draw a line but the answer is 15

Ajar contains 35 dimes and nickels. The total value of the coins is $2.50. If
d = the number of dimes and n = the number of nickels, this is the system of
equations:
d+ n = 35
0.100+ 0.05n = 2.50
How many of each type of coin are there? Solve the system to answer the
question

Answers

Answer:

0.05x+0.10(35-x)=2.50

(0.05x+3.5-0.10x=2.50) get rid of devimal points by multiplying both sides by 100

5x+350-10x=2505x-10x +350-350=250-350(-5x= 100)divide both by -5-5x/-5= -100/-5x=20(the number of nickels)

The number of dime is35-x. and x=2035-20=15the number of dimes is = 15the number of nickels is = 2020nickels =$1.0015dimes =$1.50

check

the number of dimes + the number of nickels is $2.50d+n=$2.50. : d=$1.50 and n=$1.00$1.50 + 1.00 =$2.50

‼️‼️help me quick pls On a piece of paper, use a protractor to construct a triangle with angle measures of 30° and 120° Which statements about this triangle are true? Select all correct answers O The third angle measures 75' The third angle measures 90 All sides have different lengths Two sides have the same length. The third angle measures 30”.​

Answers

The third angle measures 30° and two sides have the same length.

What is a triangle?

A triangle is a polygon with three sides and three angles. The angles in a triangle sum up to 180°.

Types of triangles are scalene, isosceles, equilateral and right angled triangle.

Let x represent the third angle of a triangle with angle measures of 30° and 120°. Hence:

x + 120 + 30 = 180° (sum of angles in a triangle)

x = 30°

Since two angles are the same, hence two sides have the same length.

Find out more on triangle at: https://brainly.com/question/2644832

Answer:

x = 30°

Step-by-step explanation:

Let x represent the third angle of a triangle with angle measures of 30° and 120°. Hence:

x + 120 + 30 = 180° (sum of angles in a triangle)

Since two angles are the same, two sides have the same length.

Other Questions
The area of a square-shaped rug is 144 ft^2. What is the perimeter, in feet, of the rug? Jaq ueline has 15 cookies to share with her study group. If there are 4 kids in the group and they want to split the cookies evenly they are even willing to cut a cookie if they need to. how many cookies will each person get? If a rectangular prism has a length of 3 feet, a width of 4 feet, and a height of 5 feet and you double the width, what will happen to the volume and surface area? Who was considered to be the architect for the plans for indian removal?. Factor completely 8x2 4x 84. 4(2x 3)(x 7) 4(2x 3)(x 7) 4(x 3)(2x 7) 4(x 3)(2x 7). in your own opinion, what role do objectives play in the mainstream school curriculum? What is the surface area of the box, in square feet, that Zoey decorates? Which are solutions of the linear equation?Select all that apply. 3x + y = -10 (-1, -6)(-2 -4) (-3,1)(-4. 3)(-5. 5) i need help with this please its urgent Select the correct answer.Derek works in the software quality assurance department. Which tools or process should Derek use to monitor and measure changes?A. software engineering processB. software quality metricsC. SQA auditsD. reviews Did the benefits of Roman expansion outweighed the costs Tammy runs 8 miles in 45 minutes. How many minutes does she take per mile? rezumat "Moara lui Califar" what is Pasat in art terms?? QUICK whoever gives correct answer will get brainliest please and thank you. How did Catholic leaders encourage change during the Catholic Reformation?through a return to simonythrough a return to community servicewith a break from the sacramentswith a break from church expansion Jane has 4 more jelly beans than Dan. If Jane has 13 jelly beans, how many jelly beans does Dan have Which system of equations has no solution? HELP ASAP!!!!!! Find x plissssssssssssss How do I get the correct answer