Mathematics Middle School

THIS IS EASY BUT IM DUM SO I DONT GET IT
Ben’s speedometer showed he was driving 35 miles per hour. A police car’s radar showed he was actually driving 40 miles per hour. What was Ben’s approximate percent of error in his driving speed?

A.
13%

B.
14%

C.
6%

D.
5%

Answers

Answer 1
Question: What is 35 percent of 40?

Percentage solution with steps:

Step 1: Our output value is 40.

Step 2: We represent the unknown value with $x$x​.

Step 3: From step 1 above,$40=100\%$40=100%​.

Step 4: Similarly, $x=35\%$x=35%​.

Step 5: This results in a pair of simple equations:

$40=100\%(1)$40=100%(1)​.

$x=35\%(2)$x=35%(2)​.

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both
equations have the same unit (%); we have

$\frac{40}{x}=\frac{100\%}{35\%}$
40
x​=
100%
35%​​

Step 7: Again, the reciprocal of both sides gives

$\frac{x}{40}=\frac{35}{100}$
x
40​=
35
100​​

$\Rightarrow x=14$⇒x=14​

Therefore, $35\%$35%​ of $40$40​ is $14$ B. 14%

Related Questions

Help please math 7thgrade

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the biker rides 60 miles in 4 hours :)

Can someone plz help me with this one problem plz plz help plz plz

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Answer: Yes

Step-by-step explanation:

y = 1 would be a line going forever across x-axis

so as long as its (x, 1) it will satisfy that equation

Yes it does I have that question

In Nancy's class, 11/18 of the girls have brown eyes, 2/9 of the girls have blue eyes, and 1/6 of the girls have hazel eyes. How many of the girls have either blue or brown eyes? [Note: Write your answer in simplest form.]

13/18
13/27
5/6
15/18

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Answer:

15/18

Step-by-step explanation:

7-2(x-5)
....................

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-2x+17......let me know if i’m right
-2x + 17 i think is the answer

One way to convert from inches to centimeters is to multiply the number of inches by 2.54. How many centimeters are there in 1/4 inch?

Answers

Answer:

0.635

Step-by-step explanation:

There are 0.635 centimeters in 1/4 inch.

To convert inches to centimeters using the conversion factor of 2.54.

you can multiply the number of inches by 2.54.

To find the number of centimeters in 1/4 inch, you would multiply 1/4 by 2.54:

(1/4) × 2.54

= 0.25 × 2.54

= 0.635

Therefore, there are 0.635 centimeters in 1/4 inch.

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[tex]\sqrt{16}[/tex]

Answers

Answer:

4

Step-by-step explanation:

desmos calculator

but i knew it off the top of my head  

fast/best answer get brainlist
please help
image 2 and 3 are the same question

Answers

the first answer is 3! the second one is the second graph!
yeah what they said

A small bag has 8 black beans, 5 white beans, and 12 red beans. Find the probability of picking a red then a black bean if you do not replace the first bean.

A. 0.16

B. 0.32

C. 0.3

D. 0.5

Answers

Answer:

the answer is A

Step-by-step explanation:

because 8 divided by 25 (all the beans) is .32

And  12 divided by  25 is .48

So if you subtract .48 by .32 then you get .16

let me know if its right

The answer is A. 0.16

A triangle has side lengths of (6v+2) centimeters, (6v+5) centimeters, and (3w-2) centimeters. Which expression represents the perimeter, in centimeters, of the triangle?

ILL GIVE YOU BRAINS :)

Answers

The expression that represents the perimeter is [tex]12v + 3w + 5[/tex]

Definition of Perimeter

      The perimeter of a figure is defined as the total length of the outer boundary of that figure. It is the sum of length of each side of a figure.

Calculation of Perimeter of given triangle:

Given,

The triangle has sides of length [tex](6v+2)cm, (6v+5)cm[/tex] and [tex](3w-2) cm[/tex].

The perimeter can be calculated by adding the sides.

⇒ [tex](6v+2) + (6v+5) + (3w-2)[/tex]

Now, like terms and constants can be written together

⇒ [tex]6v + 6v + 3w + 2 + 5 - 2[/tex]

⇒ [tex]12v + 3w + 5[/tex]

Hence, the expression that represents the perimeter of given triangle is  [tex]12v + 3w + 5[/tex].

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ASAP
what is the GCF between x3 y5 and x4 y2

Answers

Answer:

Step-by-step explanation:

x^3y^5: x, x, x, y, y, y, y, y

x^4y^2: x, x, x, x, y, y

GCF: x^3y^2

Answer: x3,y5= 1

x4,y2= 1

For 1–3, find the area of each circle. Use 3.14 for π. Round to the nearest tenth if necessary.

3. a circle with diameter 14 in.

Answers

Answer:

153.9

Step-by-step explanation:

I got 153.9 but I don’t know if that’s right

Please help if you can. If possible please type how you got the answer so I can remember it next time I have a question like this.

Answers

Answer: the image doesnt show

Step-by-step explanation:

Cost of computer $1000.00 (listed in order)

Mark-up 10%

Discount 40%

tax 3%
A.
$679.80

B.
$615.25

C.
$690.00

D.
$650.50

Answers

The answer would be A)$679.80
The reason for this is let’s start with the mark up of 10%. Meaning we will add the result of the markup to our first number We would take 1000*.1 which would give us 100.
Add that to the original to give you $1,100.
Then the item was discounted for 40% meaning we take away the result of 1,100*.4 which equals 440. 1100-440=660.
Then taxes are added on to the total so you would do 660*.03 which would give you 19.8
660+19.8 gives you$679.80.
the answer is A i hope this helped

please help will mark brainliest

Answers

Answer:

The answer is C :)

Step-by-step explanation:

The perimeter of M'N'O'P IS 3 times the perimeter of MNOP

hope i helped :)

Find the probability of rolling two dice and getting a sum of 11.

A. 1/36

B. 1/18

C. 1/12

D. 1/6

Answers

the answer to your question is D
B) 1/18!!!

2/36 simplified to 1/18

good luck!

what is the answer to

0.25p + 1 ≤ 9

? please help

Answers

P is less than or equal to 32

Answer:

P is less than or equal to 32

Step-by-step explanation:

6. Heidi read 26 pages in 14 minutes. At what speed did she read?

Answers

Answer:

1.9 or about 2 pages per minute

Step-by-step explanation:

Just 26/14

Good luck luv!

Heidi read 26 pages in 14 minutes, then the speed of Heidi of reading book will be equal to 1.85 page per minute.

What is arithmetic Operations?

The four fundamental operations of arithmetic are addition, subtraction, multiplication, and division of two or even more items.

Included in them is the study of integers, especially the order of operations, which is important for all other areas of mathematics, notably algebra, data management, and geometry.

As per the given information in the question,

Total pages read by Heidi = 26

Total time to read the pages = 14 minutes

So, the speed of reading will be,

s = 26/14

s = 1.85 page per minute.

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PLZ IM BAD AT MATH :( PLZ GIVE ME A REAL ANSWER

Answers

25 1/2

Step-by-step explanation:

17 / 1 multiplied by 3 / 2

help me please im stuck! i will give brainiest! and thank you! and 5 stars!!

Answers

1. 16cm
2. 8cm

To find the area for a square you multiple The length of the sides

To find the area for a triangle you do 1/2b x h
1)16
2)8
The area of the triangle is 8 because to find the area you multiply your two sides together but for a triangle you divide by 2 after you multiply

FREE BARINLIEST













i knew that would get ur attention>:) FINNALY U CLICKED ME JEEZ, ANYWAYS MY QUESTION IS Last week, a pharmacy sold a bottle of shampoo for $5.00. This week, the shampoo sells for $6.50. By what percent did the price increase?

Answers

the answer would have to be 30%
The answer would be 30 percent.

It takes 4.12 gallons of paint to paint a fence.

How much paint is needed for 1/5 of the fence?

[answer] gallons

Answers

4.12 divided by 5 = 0.824

The amount of paint  needed for 1/5 of the fence is 0.824 gallons.

What is the unitary method?

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 is 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;

Paint= 4.12gallons

Now,

To find the amount of paint needed for 1/5 of the fence, we can use the following proportion:

14.12​=1/5x​

where x is the unknown amount of paint. To solve for x, we can cross-multiply and get:

x=14.12×1/5​

Simplifying, we get:

x=0.824

Therefore, by unitary method the answer will be 0.824 gallons.

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An amusement park found that 5 out of 8 visitors rode a certain roller coaster more than once on the same day. There were 12,480 visitors to the amusement park on Monday. Based on this information, how many visitors rode the roller coaster more than once on Monday?

Answers

Answer:

b.

Step-by-step explanation:

Marina deposits $1,500 in a savings account at Bank of America. The bank will pay her 5% interest at the end of the year. How much additional money from interest will Marina receive?

Answers

Answer:

75 of additional money

Step-by-step explanation:

5% of 1,500 is 75

and 1,500 plus 75 is 1575

The expression 8³⋅2−¹⁰ is equal to what?
ᶠʳᵉᵉ ᵖᵒᶦⁿᵗˢ!! ᵃⁿᵈ ᶜᵘᵗᵉ ᵖᶦᶜᵗᵘʳᵉˢ ♡

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The Awnser is 1/2 I think

Answer: ty, this gives me aesthetic vibes ❤️

Step-by-step explanation:

Find the value of X?

A.90 cm
B.40 cm
C.46 cm
D.9 cm

Answers

Answer:

D. 9 cm

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

You need to find the proportion so find two corresponding sides and divide them

32/16= 2 and or 40/20= 2

Then find x with the following equation

18= 2x

x=9

Need help with these three please and hurry

Answers

Evan will get 20,000 because 4 years is a while and I searched up and he had a pc job and you get a lot from that so hope this helps
Interest = Principal x Rate x Time
I = (6,000)(0.04)(4years) = $960
And 10 years would be
I = (6,000)(0.04)(10) = $2,400

Please answer!! Im confused currently!!

Answers

circumference/perimeter = 2 x pi x r or pi x d
so 2 x 3.14 x 1.7 = 10.676
so C (10.7)

Answer:

2πr=c, Perimeter, or Circumference is what we are looking for, and this is the formula.

so we need to figure out 2 x 3.14 x radius:1.7 = Perimeter or Circumference

2 x 3.14 = 6.28

6.28 x 1.7 = 10.28

P.S. answer is 10.7, my answer is simplified.

~Hope this helps~

Simplify.
√240
A √230
B √1024
C √640
D √415

Answers

Answer: D

Explanation: 4^2 x 15
Both go into roots then you end up with 4/15 (I can’t find the symbol )
The answer for this is D

PLZ ANSWER FAST WILL GIVE BRAINLIEST
1.) A bag contains three red marbles and four blue marbles. You randomly pick a marble and then a second marble without returning the marbles to the bag. What is the probability that both marbles are red?
1/7, 24/91, 10/39, 12/49

Answers

Answer:

The answer is 1/7 bc I doubt they would both be red bc theres more blue then red

the answer is 1/7 ! hope this helps

Charlie runs a book rental business. He currently charges $3 per book and rents out an average of 38 books a day.

According to a study, for every 50¢ increase in rental price, the average business can expect to lose 4 rentals a day.

Complete the equation that models this scenario, where b(x) is the revenue generated and x is the number of 50¢ price increases.

b(x) = -
x2 +
x +

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Here is the answer to your problem
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