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
Valentin [98]
3 years ago
13

The length of a diagonal of a square is 7.5 mm. Find the area of the square.

Mathematics
1 answer:
dexar [7]3 years ago
7 0
By Pythagoreans' theorem,

7.5² = l² × b²
56.25 = l² × b²

Since l = b
56.25 ÷ 2
= l²/b²
= 28.125 mm

∴ l = √28.125
= 5.3033 mm

Area of square
= √28.125 × √28.125
= 28.125 mm²
≈ 28.1 mm² (3s.f.)
You might be interested in
there are 60 students in advanced math classes 57 students got passing grades what percent of the students passed
k0ka [10]
57 / 60 will give you the percentage! :) 

95% of students passes.
7 0
3 years ago
Read 2 more answers
On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a
Ghella [55]
The probability of Erin not having a heart attack according to her family history would be 30%.

The probability of the test predicting correctly is 67%.

Therefore, the probability of the test correctly predicting that Erin will not have a heart attack would be (0.30)(0.67) = 0.201 or 20.1%.
8 0
3 years ago
Read 2 more answers
What is the value of the expression? 9^8 over 9^-4 x 9^10 (Fraction)? Please help me :)
Alchen [17]
The answer is 3^12. i'd explain it but i took me seven minutes to do the the problem myself. :)
5 0
3 years ago
Jared withdrew $5 from his savings account each month for 4 months. Write a multiplication expression for the total change in hi
Ugo [173]
5x4=the amount of change. His total change was $20
3 0
3 years ago
Can someone help me with these two problems please!!!!!
forsale [732]

Answer:

The question at the top is:

Factor  

x 2 + 2 x − 63

using the AC method.

( x − 7 ) ( x + 9)

WHICH THE ANSWER IS (B)

The question at the bottom is:

Factor  

x 2 + 18 x + 80

using the AC method.

( x + 8 )  ( x + 10 )

WHICH IS ANSWER (C)

Step-by-step explanation:

Hope this helped! :)

5 0
3 years ago
Other questions:
  • the line joining A(a, 3) to B(2 -3) is perpendicular to the line joining C(10,1) to B. The value of a is?
    10·1 answer
  • What is the term and definition for coordinate plane​
    9·1 answer
  • Find the degree of this monomial. -5a^8
    14·1 answer
  • After school, Bruce skateboards directly from school to a skate park and then from the
    15·1 answer
  • What is the equation of this function?<br> A<br> B<br> C<br> D
    7·1 answer
  • The speed of light is 3 x 108 m/s. If its frequency is 4.11 x 104 Hz, what is its wavelength?
    11·1 answer
  • Select all the statements that describe the expression 5+2x.
    9·2 answers
  • Do you have 135$ in a savings account and save $12 per week your friend has $95 in a savings account and save $20 per week how m
    10·1 answer
  • Hannah's car used 5 gallons to travel 220 miles. How many miles can the car go for each gallon of gas?
    14·2 answers
  • What are Co-Interior angles
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!