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
Fantom [35]
3 years ago
13

Does anybody know this? 21 + 3 + (8 -2 +2)

Mathematics
1 answer:
Maurinko [17]3 years ago
8 0
By law of BIDMAS, we must start with brackets
= (8-2+2)= 8
21 + 3= 24
24 + 8 = 32
Hope this helps, have a nice day!:)
You might be interested in
One of the roots of the quadratic equation dx^2+cx+p=0 is twice the other, find the relationship between d, c and p
scZoUnD [109]

Answer:

c^2 = 9dp

Step-by-step explanation:

Given

dx^2 + cx + p = 0

Let the roots be \alpha and \beta

So:

\alpha = 2\beta

Required

Determine the relationship between d, c and p

dx^2 + cx + p = 0

Divide through by d

\frac{dx^2}{d} + \frac{cx}{d} + \frac{p}{d} = 0

x^2 + \frac{c}{d}x + \frac{p}{d} = 0

A quadratic equation has the form:

x^2 - (\alpha + \beta)x + \alpha \beta = 0

So:

x^2 - (2\beta+ \beta)x + \beta*\beta = 0

x^2 - (3\beta)x + \beta^2 = 0

So, we have:

\frac{c}{d} = -3\beta -- (1)

and

\frac{p}{d} = \beta^2 -- (2)

Make \beta the subject in (1)

\frac{c}{d} = -3\beta

\beta = -\frac{c}{3d}

Substitute \beta = -\frac{c}{3d} in (2)

\frac{p}{d} = (-\frac{c}{3d})^2

\frac{p}{d} = \frac{c^2}{9d^2}

Multiply both sides by d

d * \frac{p}{d} = \frac{c^2}{9d^2}*d

p = \frac{c^2}{9d}

Cross Multiply

9dp = c^2

or

c^2 = 9dp

Hence, the relationship between d, c and p is: c^2 = 9dp

8 0
3 years ago
Find z.<br><br> What is the length of the missing leg?<br><br> b = _____ miles
ycow [4]

Answer:

5√3

Step-by-step explanation:

tan30= 5/z

1/√3= 5/z

z= 5√3

6 0
2 years ago
Read 2 more answers
I need help on slope!
Brrunno [24]

Answer:

A) Y=3X -2

Step-by-step explanation:

8 0
3 years ago
in a right triangle,one leg measures 4 inches and the other leg measures 6inches. what is the length of the hypotenuse in inches
Sergio039 [100]
A^2 + b^2 = c^2  a=4 b= 6
4^2 + 6^2 =52
square root that: 
c=2 square root 13 exactly or 7.2 approximately <span />
7 0
3 years ago
36 ÷ 3^2 +4*2-1<br> can u help me get the answer?
spin [16.1K]
<span>36 ÷ 3^2 +4*2-1
</span>=36 ÷ 9 + 4*2-1<span>
=</span>4 + 8 - 1
= 11

USING PEMDAS
6 0
3 years ago
Read 2 more answers
Other questions:
  • The movie theater received $1,245 for tickets they sold on Monday. The theater received $955 for tickets sold on Tuesday. Each t
    8·2 answers
  • What is 2(x+6)=20 pls I need help
    5·2 answers
  • 8n + 10 + 6 = -8 + 5n<br> N= Help ASAP
    13·1 answer
  • - 2x+y=2<br> x+6y=-21<br> A) (<br> 34)<br> D) (-3, 4).<br> (-1.4)<br> B) (3.2)
    6·1 answer
  • I have 24 golf clubs. i have 3 bags. how many clubs do i have in each bag.
    12·2 answers
  • What is common to all webpages in a website?<br>A: Content<br>B: Domain name<br>C: Server​
    5·1 answer
  • Multiply (x^2+3x-4)(x+5)
    12·1 answer
  • 6x +4y = 42<br> 3x +4y = -6
    9·2 answers
  • Having trouble i don't understand the problem
    5·1 answer
  • Yo last one c'monnn pls someone!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!