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
lesya [120]
2 years ago
5

Solve for j. 144j2 + 21 = 85

Mathematics
1 answer:
Sphinxa [80]2 years ago
5 0

Answer:

2/3

Step-by-step explanation:

I assume the 2 after the j is a square. So, we bring the 21 to the other side by subtracting it from both sides, getting 144j^2=64. Now we divide to get 64/144 = j^2. Make sure NOT to simplify it, it's perfect right now. The square root of that is \sqrt{64}/ \sqrt{144}, or 8/12, which we can now simplify to 2/3. Hope this helps!

You might be interested in
YO PLS HELP ASAP !!! MARKIN <br>BRAINIEST !!! btw da drop down answers are da same as whats shown​
ale4655 [162]

Answer:

1. Is

2. Is

3. Is not

4. Is not

lol give me brainliest please!

8 0
3 years ago
The length of a side of a cubical box is 45 m.Find its volume​
Harlamova29_29 [7]

Step-by-step explanation:

Since the box is a cube,

Length = Width = Height = 45m.

Volume of box = Volume of cube

= Length x Width x Height

= 45 \times 45 \times 45 \\  = 91125 {m}^{3}

8 0
2 years ago
If a = 7 and b = 11, what is the measure of ∠B? (round to the nearest tenth of a degree)
Firdavs [7]
Is there a picture for this if so can you post it
8 0
3 years ago
F(x)=5-2x<br><br>PLEASE HELP DUE TODAY!!!
EastWind [94]
If f(1) =5-2(1)
F(2)=5-2(2)
3 0
3 years ago
In triangle abc angle a +angle b =90 then sin a =
Ivan

Answer:

sin(a)=cos(b)

Step-by-step explanation:

we know that

In the triangle abc

if m\angle a+m\angle b=90^o

then

m\angle c=90^o

Because, the sum of the interior angles in a triangle must be equal to 180 degrees

therefore

Triangle abc is a right triangle

see the attached figure to better understand the problem

The sine of angle a is equal to divide the opposite side to angle a by the hypotenuse

so

sin(a)=\frac{x}{z}

The cosine of angle b is equal to divide the adjacent side to angle b by the hypotenuse

so

cos(b)=\frac{x}{z}

therefore

sin(a)=cos(b)

When two angles are complementary, the sine of one angle is equal to the cosine of the other angle and the cosine of one angle is equal to the sine of the other angle

so

sin(a)=cos(b)

cos(a)=sin(b)

8 0
3 years ago
Other questions:
  • Suppose that you believe that the probability you will get a grade of B or better in Introduction to Finance is .6 and the proba
    5·1 answer
  • The image below shows two parallel lines cut by a transversal. What is the value of A
    12·1 answer
  • One angle of a triangle measures 120°. The other two angles are congruent.
    12·2 answers
  • Alex wants to have $3000 in his bank account after 4 years. If the account earns 6% interest compounded 2 times per year, how mu
    6·2 answers
  • Eight increased by the product of a number and 4 is at most 20
    6·2 answers
  • 1)What are the first five terms of the sequence given by the formula an=4n+1 ?
    6·2 answers
  • Which of the following statements are true about the given rational equation?4 /x + 6 + 1/x2 = x + 10/x3+ 6x2
    5·2 answers
  • in the early months of some year one site added 0.4 million new accounts every day. At this rate , how many days would be needed
    11·1 answer
  • Rewrite using standard notation: 291.2 × 10-2 2.912 29.12 291.2 29,120
    10·1 answer
  • 2 sides of a triangle have the following measures. Find the range of possible measures for the third side.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!