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
Kobotan [32]
3 years ago
14

Hey yall so im taking a test and imm very confused on hwo to find the letter n for the equation

Mathematics
1 answer:
kotegsom [21]3 years ago
8 0

Answer:

n = -7,6

Step-by-step explanation:

n(n+1)+3=45

distributive property: a(b+c) = ab+ac

n²+n+3 = 45

n²+n -42 = 0

factor now

(n+7)(n-6) = 0

n = -7,6

You might be interested in
If ∠a and ∠b are supplementary and m∠a = 37°45', then m∠b =
dlinn [17]

a + b = 180

37.45 + b = 180

b = 180-37.45 = 142.55

5 0
3 years ago
DAVID PLZ HELP LAST ONE
Leto [7]

Answer:

1.D

2.c

Step-by-step explanation:

f(m/4)=8(m²/16)-4(m/4)

=m²/2-m

f(-4)=-3(-4)²+5(-4)

=-3(16)-20

=-48-20

=-68

3 0
3 years ago
Read 2 more answers
Multiply 5(−37). Simplify your answer.
crimeas [40]
-2 1/7 is the correct answer.
5 0
3 years ago
Read 2 more answers
Work out the value of each expression, when r= 2.5 and t = 6.
Usimov [2.4K]

Answer:

a)  4(t - r) = 4(6 - 2.5) = 4 x 3.5 = 14

b)  4t - r = (4 x 6) - 2.5 = 24 - 2.5 = 21.5

c)  2(3t - 10) = 2(3 x 6 - 10) = 2(18 - 10) = 2 x 8 = 16

d)  (t - 2)² = (6 - 2)² = 4² = 4 x 4 = 16

e) cannot decipher the equation

f)  6r + t = 6 x 2.5 + 6 = 15 + 6 = 21

8 0
2 years ago
Read 2 more answers
Can someone please answer. There is one problem. There's s picture. Thank you!
Pepsi [2]
The correct answer is the first option, 23.1 miles.

Knowing that the sum of the triangle's interior angles should equal a measure of 180°, you can start off by solving for the missing interior angle, near the library.

Since this is a right triangle (meaning one of the angles is 90°), and the other angle is given (57°), simply subtract these two values from 180° to get 180-(57+90)=33\textdegree.

Next, use the Law of Sines (stated below) which will allow you to solve for the missing distance from the radio tower to the library in miles, using the angle measures and height from the tower to the balloon that you've found.

\frac{\sin(A)}{a} =  \frac{\sin(B)}{b}

For this problem, we'll let the height of the hot air balloon be a=15 and its respective opposite angle be A=33\textdegree, and let the missing x-distance be b, with its respective opposite angle B=57\textdegree. Note, we're solving for b.

\frac{\sin(33)}{15} =  \frac{\sin(57)}{b} \\ \\
b\times sin(33)=15\times \sin(57) \\ \\
b=\frac{15\times \sin(57)}{sin(33)} \\ \\
b\approx \frac{15\times 0.84}{.54} \\ \\
b\approx \frac{12.6}{.54} \\ \\
b\approx \frac{12.6}{.54} \\ \\
b\approx 23.3

Because there was a lot of approximation in the above operations, the answer doesn't exactly match any of the answer options in the question. However, it's very close to the first option, 23.1 miles, so that must be the correct answer.
8 0
2 years ago
Other questions:
  • What is the volume of the item described? An ice cream cone with a cone of radius 2 cm and height of 9 cm with a hemisphere of i
    12·2 answers
  • Batteries come in packs of 4. Last month, Joe used 58 batteries in his remote control drone. How many packs of batteries did he
    11·1 answer
  • 5 times the sum of 8 and d
    12·1 answer
  • Determine the value of theta to the nearest degree if cot(theta) = 2
    9·1 answer
  • Solve the inequality of -4m≥-4
    7·2 answers
  • A study is performed in San Antonio to determine whether the average weekly grocery bill per five-person family in the town is s
    11·1 answer
  • Frank solved an equation and got the result x = x. Sarah solved the same equation and got 12 = 12. Frank says that one of them i
    10·1 answer
  • Apple is currently charging $179 for their AirPods and wants to conduct market research to see
    7·1 answer
  • 3/45 simplified (pls help)
    7·2 answers
  • Find each sum.<br> 2.7 and 4.1
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!