Mathematics High School

the length of a rectangle is 7 cm more than its width and the area is 30 cm find the length, width and the perimeter

Answers

Answer 1

Answer:

Step-by-step explanation:

let width=x

length=x+7

x(x+7)=30

x²+7x-30=0

x²+10x-3x-30=0

x(x+10)-3(x+10)=0

(x+10)(x-3)=0

either x=-10 (rejected being negative)

or x=3

width=3 cm

length=3+7=10 cm

Perimeter=2(10+3)=2×13=26 cm

Related Questions

PLEASE HELP ILL GIVE BRAINLIEST
PLEAZE SHOW WORK

Answers

Answer:

A

Step-by-step explanation:

divide it

45/.7

Benjamin is having a picnic at his house. He plans to make burgers for each of his guests. He uses 4 ounces of ground beef for each burger. How many pounds of ground beef does bengimen need to buy to make 24 burgers

Answers

There are 16 ounces in 1 pound that should help

pj is placing cans on a shelf. she makes a pattern that repeats after 4 cans. if pj repeats the problem, what will the 21th can look like

Answers

Answer:

like the 3rd in the cycle

Step-by-step explanation:

Answer:

i tihkn orange

Step-by-step explanation:

It costs $4 to park a car in a lot and $0.50 per hour to keep it there. Write a function to represent the total cost to a car parked in this lot for h hours?

Answers

y = 4+0.5h
h = number of hours
y = total cost

PLS HELP!!! 7TH GRADE MATH

Answers

Answer:

The first picture is 72 ft²

Step-by-step explanation:

Answer for 1:

242

Answer for 2:

214.57

Answer for 3:

88.79

Explanation:

I used Goggle

Could you guys please help me solve this basic math. PLS OMG ITS DUE :(

Answers

the answer is -7. 21- -3=-7

637m as a fraction of 7.7km

Answers

Answer:

637/7700

Step-by-step explanation:

7.7 km = 7700 m

There are 136 students at the dance. 62 of the students are females. What is the ratio of boys to girls at the dance? PLEASE HURRY!!!

Answers

The ratio of boys to girls is 74:62

74 represents the boys

62 represents the girls

what is the missing length?

Answers

7.9^2 + 8.5^2= sqrt 134.66 = 11.60 ft

PLZ HELP!! NO SNEAKY LINK OR NON- ANSWERES!!!! IM TIMED HELP ME GUYS!!!!!

Answers

Answer:

top right :3

Step-by-step explanation:

if 1/4 gallon of paint covers 1/3 of a wall in luna’s bedroom, how much paint does she need to cover 1 wall?

Answers

Answer:

3/4

Step-by-step explanation:

Simplify using properties of operations and then factor the expressions using the GCF. (2g + 2) - (-4g - 7)

Answers

Answer:

3(2g + 3)

Step-by-step explanation:

We start out with the expression (2g + 2) - (-4g - 7).

Firstly, let's distribute the negative:

(2g + 2) - (-4g - 7)

2g + 2 + 4g + 7

Now, combine like terms:

2g + 4g + 7 + 2

6g + 9

The GCF stands for "Greatest Common Factor." In this case, we have to find the GCF between 6 and 9. What is the GCF of 6 and 9? It would be 3. So,

6g + 9

3(2g + 3)

hii please help i’ll give brainliest

Answers

Answer:

the coefficient is 2

2x^4 = 2 * x^4 = 2 is the coefficient

hope that helps

Answer:

2

Step-by-step explanation:

The coefficient of a term is the number that multiplies the variables of the term.

In the term 2x^4, the number multiplying the variables is 2, so the coefficient is 2.

Ellie wanted to build a fence around her rectangular garden. The garden is 10 ft by 20 ft. A) What is the perimeter of the garden in feet?

Answers

Answer:

60 feet

Step-by-step explanation:

Perimeter is the sum of the four sides of a rectangle

the formula for the perimeter of a rectangle = 2 x (length + breadth)

2 x (10 + 20)

2 x (30)

= 60 feet

Alternatively, you can add the sides together : 10 + 10 + 20 + 20 = 60 feet

I need help I would appreciate it if u would help me with this problem :)

Answers

Answer:

The answer is letter A.

Step-by-step explanation:

 The amount that each company charges per hour on the pool is known, however the amount of hours they will be working is not, and is needed to distinguish which company is cheaper. Therefore, the number of hours is  substitued by x and it is right next to the amount they charge for each hour. To find what each company charges, you must sum up what they charge and what they charge per hour, times the hours they will have to work on it( which is unknown and by x).

find the value of given expression

[tex] \sqrt{25 \times 625 \times \times 25} [/tex]

​

Answers

Answer:

±625

Step-by-step explanation:

[tex]\sqrt{25 x 625 x 25}[/tex]

[tex]\sqrt{390625}[/tex]

±625

Answer:

√(25×625×25)√{5²×25²×5²)=±(5×25×5}=±625 is your answer

Steve uses 14 blue beads and 6 green beads to make a bracelet. Which ratio compares the number of blue beads to the total numbers of beads in one bracelet?
A. 14:6
B. 6:14
C. 6:20
D. 14:20

Answers

There are 14 blue beads in total. If you use 14 blue needs and 6 green needs that is 14+ 6 which equals 20.

The volume of the rectangular prism is ___ cubic units.

Answers

Answer:

144 cube units

Step-by-step explanation:

volume = width*height*length

V=12*3*4

V=144 cube units

Answer:

This is your answer. If I'm right so,

Please mark me as brainliest. thanks!!!

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

Answers

Answer:

No.

Step-by-step explanation:

In order for this equation to be true, either the 8 would have to be negative or the 11.

which number is composite 5,11,9,2

Answers

The number 11 is combosit

Answer:

11

Step-by-step explanation:

trust

Simplify the fraction to lowest terms, and enter your answer below as a
fraction, using the slash mark ( 7 ) as the fraction bar.
4
12

Answers

Answer:

1/3

Step-by-step explanation:

Write the polynomial 4x+5x^3+17x^5-7 in descending order.

Answers

Answer:

5x+4x^17+3x^5-7

Step-by-step explanation:

Find the measures of the numbered angles in the quadrilateral.

Answers

Answer:

c

Step-by-step explanation:

angles in a triangle r equal to 180

180-90-65 is equal to 25

and 1 is 90 degree

What is the correct answer?

Answers

Answer:

F

Step-by-step explanation:

The answer to your question is F

i have no idea where to plot the points

Answers

Answer:

1/4 is slope\

Step-by-step explanation:

1/4 it’s going on a down slope

You prepare8 scoops of dog food for 4 ​dogs, and prepare15 scoops of dog food for 6 dogs. Is there a proportional relationship between the number of scoops and the number of​ dogs?
Choose the correct answer below.

Answers

Answer:

Is there a proportional relationship between the number of scoops and the number of​ dogs?

No.

Step-by-step explanation:

A proportional relationship is something like:

y = k*x

Here y can represent the number of scoops of dog food, and x the number of dogs.

First, we know that for 4 dogs he prepares 8 scoops of dog food, then:

8 = k*4

If the relationship is proportional, then we should have a similar equation for the case of 6 dogs, where he prepares 15 scoops of dog food:

15 = k*6

So if we have the same k in both equations, then there is a proportional relationship between the number of scoops and the number of dogs.

In the first equation we have:

8 = k*4

8/4 = k

2 = k

And in the second equation we have:

15 = k*6

15/6 = k

2.5 = k

The values of k are different, so no, there isn't a proportional relationship between the number of scoops and the number of dogs.

SOMEONE PLEASE HELP ME ILL GIVE YOU BRAINLY IF YOU GET IT RIGHT!!!!

Answers

Answer:

A

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

1. P(E)>P(D) (Event E is more likely to occur, therefore it has a greater probability)

2. P(E)>0.5 (The probability of event D is given as 0.5, so rewrite P(D) in the inequality)

3. 0.5 is equal to 0.5 and 0.1 is less than 0.5, so you can rule out options A and D

4. This leaves us with options 1.5 and 0.9, but it is impossible to have a probability that is greater than equal to one, so you can immediately rule out B

5. After this elimination process, the only remaining answer is C) P(E)=0.9

Pls help me with this problem

Answers

Answer:

2

Step-by-step explanation:

Since this is a right triangle, we can use the Pythagorean theorem

a^2 +b^2 = c^2  where a and b are the legs and c is the hypotenuse

a^2 + (2.1)^2 = (2.9)^2

a^2 +4.41=8.41

a^2 = 8.41-4.41

a^2 =4

Take the square root of each side

sqrt(a^2)=sqrt(4)

a=2

what is the solution to the inequality

Answers

it would be x ≥ -2
i’ll attach an image to show work

I don't get what to do with this!

Answers

Answer:

76+76=152

Step-by-step explanation:

Other Questions
if f(x)=5x-7,what isf(3)? Use similar triangles to solve for the missing lengths below.If you know how to work this out please help:) The length of a rectangle is x feet more than its width. The area of the rectangle is 5x + 25. What is the width of the rectangle? Define a function named sum_values with two parameters. The first parameter will be a list of dictionaries (the data). The second parameter will be a string (a key). Return the sum of the dictionaries' values associated with the second parameter. You SHOULD NOT assume that all of the dictionaries in the first parameter will have the second parameter as a key. If none of the dictionaries have the second parameter as a key, your function should return 0. Sample function call: sum_values(data, 'estimated_annual_kwh_savings') sum_values_by_year A wasp lays eggs on an orb-weaving spider to... a) force it to protect the wasp and it's larva. b) make it provide a home and meal for it's larva.c) use it to carry it's larva Long distance. d) make it create a cocoon for the larva. Find X please help me with test corrections due midnight tonight!If HBN is congruent to LYR. What is the balance of $6000 compounded annually at a rate of 4% for 10 years? help what is the answer According to the author of "Is Online BrainTraining Actually Effective?" what is a possibleflaw in the author's reasoning in "OnlinePrograms to Train Your Brain"?O A. Brain training is effective because researchsuggests it improves intelligence.B. Brain research shows that your memorybenefits from games.C. Healthy living includes having quality brainfunction.o D. Fluid memory helps with intelligence. Which expression is equivalent to sqrt -108 - sqrt -3?A) 5 sqrt 3iB) 6 sqrt 3iC) 7 sqrt 3iD) 8 sqrt 3i 1) Find the missing angle.31949 Pretrito de los verbos en -ar y del verbo ir The logarithm of a number to the base V2 is k. What is its logarithm to the base 2v2 ? #6 need help asap will give brainly An equation is given.2x = 26which calculation would need to be done to solve the equation?a. divide both sides by 2b. divide both sides by 26c. multiply both sides by 2d. multiply both sides by 26 If the US were attacked today, what countries would come to our defense the exact position of the electrons of an atom cannot be determined because they are in constant ___ Please help me with this. I will mark brainliest.Write a story which includes the words: I was lucky that I ran as quickly as I did. Termites are unable to digest some plant materials (fiber). Termite stomachs contain bacteria that digest the fiber in wood for the termites. In turn, the bacteria are provided with a hospitable environment to carry out their life processes.commensalismmutualismparasitismcompetition The radius of a circle is 3.9 in. Find the circumference to the nearest tenth.