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
riadik2000 [5.3K]
3 years ago
8

WHAT IS THE HCF OF 21 28 42

Mathematics
1 answer:
gulaghasi [49]3 years ago
8 0

Answer:

7.

Step-by-step explanation:

21 = 3 * 7

28 = 2 * 2 * 7

42 = 2 * 3 * 7

Collecting common factors:

t is common to all 3 sets of factors so

HCF = 7.

You might be interested in
Seven tenths of a number plus 14 is less than forty-nine
Virty [35]
7/10n + 14 = 49
7/10n = 35
n = 35 x 10/7
n = 50
7 0
3 years ago
How do you find the variable when it’s on both sides of the equation
ASHA 777 [7]

If, for example, you had x on one side and x on the other, then subtracting x from both sides "disappears" x. If no other power of x shows up on either side, then your equation either has no solution or is always true.


3 0
3 years ago
A box of oatmeal has the shape of a cylinder. The box is 7 inches high and has a radius of 2 inches. What is the volume of the b
ICE Princess25 [194]

Answer:

87.96

Step-by-step explanation:

The formula for a cylinder. (Well to find the volume anyway) Is

V = V = \pi r^2

Plug in your values and you will get the answer 87.96.

5 0
3 years ago
Find the number of real zeros of
Amiraneli [1.4K]

Answer:

B

Step-by-step explanation:

Using the determinant to determine the type of zeros

Given

f(x) = ax² + bx + c ( a ≠ 0 ) ← in standard form, then the discriminant is

Δ = b² - 4ac

• If b² - 4ac > 0 then 2 real and distinct zeros

• If b² - 4ac = 0 then 2 real and equal zeros

• If b² - 4ac < 0 then 2 complex zeros

Given

f(x) = (x - 1)² + 1 ← expand factor and simplify

     = x² - 2x + 1 + 1

    = x² - 2x + 2 ← in standard form

with a = 1, b = - 2, c = 2, then

b² - 4ac = (- 2)² - (4 × 1 × 2) = 4 - 8 = - 4

Since b² - 4ac < 0 then the zeros are complex

Thus P(x) has no real zeros

6 0
3 years ago
How to find volume of sphere explain step by step
Sergeu [11.5K]

Answer: What is the easiest way to find the volume of a sphere?

Image result for How to find volume of sphere explain step by step

To calculate the volume of a sphere, use the formula v = ⁴⁄₃πr³, where r is the radius of the sphere. If you don't have the radius, you can find it by dividing the diameter by 2. Once you have the radius, plug it into the formula and solve to find the volume.

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • How to simplify 1/2/1/8
    8·1 answer
  • Here are the two arguments you will be debating: Argument A: There is a need for students to understand and be able to construct
    7·1 answer
  • Complex numbers. how do I graph the complex number and find its absolute value? 5+12i
    9·2 answers
  • Custom Greetings places an order for 300 reams of card stock paper. Its supplier offers Custom Greetings a 35% trade discount. I
    13·1 answer
  • Find the value of x and y in the parallelogram.
    5·1 answer
  • How many squares should I shade if I have 25%
    13·2 answers
  • Please help! 30 points and crown! A diagonal of a cube measures StartRoot 750 EndRoot cm. The diagonal of a face measures StartR
    11·2 answers
  • Please help, will mark brainliest
    5·1 answer
  • What is the LCM of 10 and 15?
    10·2 answers
  • Show work please!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!