1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elis [28]
3 years ago
15

The area of a square is tripled by adding 10 cm to one dimension and 12 cm to the other. Determine the side length of the square

.
Mathematics
1 answer:
Rina8888 [55]3 years ago
4 0
Area = length *width
A = x²
3x² = (x+10)(x+12)
3x² = x²+10x+12x+120
3x² = x²+22x+120
3x²-3x² = x²+22x+120-3x²
0 = -2x²+22x+120
Factor to solve for x: 
-2(x²-11x-60)
(x+4)(x-15)
x = -4  & x = 15 but we can't have a negative length so we eliminate 4. The length of the square is 15 cm.
You might be interested in
What is the Product of this Sum: x+2x+3x
Tomtit [17]
The answer is 6x

Because x is equal to 1x so 1x+2x+3x = 6x

Hope this helps :)
8 0
2 years ago
Read 2 more answers
The difference 2/5(d−10)−2/3(d+6) is
spin [16.1K]

Let's simplify step-by-step.

2/5(d−10)−2/3(d+6)

Distribute:

= (2/5)(d)+(2/5)(−10)+ −2/3d+ −4

= 2/5d+−4+ −2/3d+ −4

Combine Like Terms:

= 2/5d+−4+ −2/3d+ −4

= −4/15d+−8

And your answer is...

= −4/15d+−8

plz mark me as brainliest if this helped :)

6 0
3 years ago
Read 2 more answers
The sum of a number, n, and 6.05 is 12.4. What is n?
Irina18 [472]

Answer:

2.04

Step-by-step explanation:

Equation: 6.05n=12.4=

7 0
3 years ago
Read 2 more answers
Which points are the vertices of the ellipse?
SIZIF [17.4K]

Answer

The points of intersection of the ellipse and its major axis are called its vertices. Here the vertices of the ellipse are A (a, 0) and A′ (− a, 0).

Step-by-step explanation:

4 0
2 years ago
On day two of a study on body temperatures, 106 temperatures were taken. Suppose that we only have the first 10 temperatures to
Hitman42 [59]

Answer:

The 95% confidence interval = (98.225, 98.655)

Step-by-step explanation:

The formula for Confidence Interval =

Mean ± z × standard deviation/√n

Where Mean = 98.44°F

Standard deviation = 0.30°F

n = number of samples is 10

Because our number if samples is small, we use the t score confidence interval formula

Mean ± t × standard deviation/√n

Degrees of Freedom = n - 1

= 10 - 1 = 9

We find the t score of 95% confidence interval and degrees of freedom 9

= 2.262

Hence,

Confidence interval = 98.44 ± 2.262 × 0.30/√10

= 98.44 ± 0.214592162

Confidence Interval

98.44 - 0.214592162

= 98.225407838

≈ 98.225

98.44 + 0.214592162

= 98.654592162

≈ 98.655

The 95% confidence interval = (98.225, 98.655)

5 0
3 years ago
Other questions:
  • Vickie conducts a survey of home builders to determine the average cost of building a new home. She samples 10 home builders who
    14·2 answers
  • Find the value of x.​
    8·2 answers
  • How u do 15f+5g+45 in standard form
    15·1 answer
  • Factorize the following expression, 2p³-50​
    12·1 answer
  • Jack borrowed $ 4,000.00 and paid $ 585.00
    15·1 answer
  • If a truck travels for 3 hours, how many miles will it travel? __ miles
    15·2 answers
  • An extra-large pizza weighs 2 kilograms. How many grams does it weigh?
    9·1 answer
  • On election day ,register votes go to a polling place to cast their votes
    12·1 answer
  • X + y = 5 2x - y = 1 substitution method
    11·2 answers
  • Y = -x + 7<br><br> graph the linear equation and identify the x-intercept
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!