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
const2013 [10]
3 years ago
10

Given b= 4 and c= -5, evaluate b2 - c2. 41 -2 -9

Mathematics
1 answer:
irina [24]3 years ago
4 0

Answer:

-9

Step-by-step explanation:

b² - c²

= 4² - (-5)²

= 16 - 25

= -9

You might be interested in
a student has a savings account with $475 in it. she deposits $125 of her paycheck into the account every week.
soldier1979 [14.2K]

Answer:

350

Step-by-step explanation:

you just have to subtract ibthink

8 0
3 years ago
Listed below are the overhead widths​ (in cm) of seals measured from photographs and the weights​ (in kg) of the seals. Construc
Anarel [89]

Answer and Step-by-step explanation: Scaterplot is a type of graphic which shows the relationship between to variables. In this question, you want to determine if there is a linear relationship between overhead widths of seals and the weights. So, the hypothesis are:

H₀: no linear correlation;

H₁: there is linear correlation;

In this hypothesis test, to reject H₀, the correlation coefficient r of the data set has to be bigger than the critical value from the table.

With α = 0.05 and n = 6, the critical value is 0.811.

The linear correlation is calculated as:

r = n∑xy - ∑x.∑y / √[n∑x² - (∑x)²] [n∑y² - (∑y)²]

r = \frac{6.9632 - 51.1108}{\sqrt{6.439 - (51^{2} )}.6.14482 - (1108^{2} ) }

r = 0.9485

Since r is bigger than the critical value, H₀ is rejected, which means there is enough evidence to conclude that there is linear correlation between overhead widths and the weights.

In the attachments is the scaterplot of the measurements, also showing the relationship.

5 0
3 years ago
Use the net to find the lateral area of the cylinder 9yd 4yd
NNADVOKAT [17]

The formula of a lateral area of a cylinder:

LA=2\pi rH

We have r = 9 yd and H = 4 yd. Substitute:

LA=2\pi(9)(4)=72\pi\ yd^2

6 0
3 years ago
IF you help me I will give you 14 points and a brainist and thank you and 5 stars
ElenaW [278]

Answer:

D

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Keelah's clothing store buys coats for $50 and then sells them for $80 .what is the percent of mark up on the price of the coat
meriva
I would say 10% but I'm not really sure
3 0
3 years ago
Other questions:
  • Ingrid has $28 to buy oil paints for her painting class. Each tube of paint
    6·1 answer
  • there are 30 students in mister Hollands music class is 30% of the students play in the school band how many students in the cla
    14·1 answer
  • 5/6+5/6 show your work
    7·1 answer
  • Write as a fraction 56:120
    6·2 answers
  • una botella de agua con capacidad de 1 ½ contiene agua en sus ¾ partes ¿cuanta cantidad de agua contiene?
    7·2 answers
  • Cara is 14 years old . This is twice as old as her brother . How old is her brother
    10·2 answers
  • I need help with this question???
    6·1 answer
  • Word problem
    7·1 answer
  • Ms. Acton spent $205.60 at Target. If the sales tax is 10%, what was her final bill?​
    11·1 answer
  • Solve for x pleaseeee!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!