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
Alex_Xolod [135]
3 years ago
5

Pleaseeeeeee help verrrrryyyyy confuseddddddd on #3

Mathematics
1 answer:
Dmitriy789 [7]3 years ago
5 0
X (adult)= 130 
y (child)= 392
(hope you can see it...)

You might be interested in
Determine whether the statement is always, sometimes, or never true: Two points A and B determine a line. *
alisha [4.7K]

Answer:

sometimes

Step-by-step explanation:

8 0
3 years ago
Find the value of x in the following system of equations: 2x−3y=9x=4+y
Klio2033 [76]

Answer:

x = 4 - 1 = 3

Step-by-step explanation:

2(4 - y) + 3y = 9

8 - 2y + 3y =9

8 + y = 9

y = 1

3 0
3 years ago
Help and add a list thank you
ZanzabumX [31]

Answer:

Answers are given in the attachment

hope it'll help you!

3 0
2 years ago
Find the percentage of change when 77 is decreased to 70. If necessary, round your answer to the nearest tenth
Svet_ta [14]
Change % = (77-70)/77 *100

= 100/11 = 9.1 % decrease

option C)

hope it helped
8 0
3 years ago
Given cosα = −3/5, 180 < α < 270, and sinβ = 12/13, 90 < β < 180
torisob [31]

I got

-  \frac{6 3}{65}

What we know

cos a=-3/5.

sin b=12/13

Angle A interval are between 180 and 270 or third quadrant

Angle B quadrant is between 90 and 180 or second quadrant.

What we need to find

Cos(b)

Cos(a)

What we are going to apply

Sum and Difference Formulas

Basics Sine and Cosines Identies.

1. Let write out the cos(a-b) formula.

\cos(a - b)  =  \cos(a)  \cos(b)  +  \sin(a)  \sin(b)

2. Use the interval it gave us.

According to the given, Angle B must between in second quadrant.

Since sin is opposite/hypotenuse and we are given a sin b=12/13. We. are going to set up an equation using the pythagorean theorem.

.

{12}^{2}  +  {y}^{2}  =  {13}^{2}

144 +  {y}^{2}  = 169

25 =  {y}^{2}

y = 5

so our adjacent side is 5.

Cosine is adjacent/hypotenuse so our cos b=5/13.

Using the interval it gave us, Angle a must be in the third quadrant. Since cos is adjacent/hypotenuse and we are given cos a=-3/5. We are going to set up an equation using pythagorean theorem,

.

( - 3) {}^{2}  +  {x}^{2}  =  {5}^{2}

9 +  {x}^{2}  = 25

{x}^{2}  = 16

x = 4

so our opposite side is 4. sin =Opposite/Hypotenuse so our sin a =4/5.Sin is negative in the third quadrant so

sin a =-4/5.

Now use cosine difference formula

-  \frac{3}{5}  \times  \frac{5}{13}  +   - \frac {4}{5}  \times  \frac{12}{13}

- \frac{15}{65} + (  - \frac{48}{65}  )

-  \frac{63}{65}

Hope this helps

6 0
3 years ago
Other questions:
  • How do i know if a shape is concave or convex
    5·1 answer
  • If $55 of a $220 budget is spent on clothes, what percent of the budget is spent on clothes?
    10·1 answer
  • Hanna reads at a constant rate of 3 pages per minute write an equation that shows the relationship bettween p the number of page
    14·1 answer
  • The difference of two numbers is 20 and their product is 125 what is the answer
    7·1 answer
  • In what direction is the line containing the point (5, 4) and (-2, 4) going?
    13·1 answer
  • How to find the diameter of a circle when given the circumference?
    6·1 answer
  • 3d trigenomatry , need help , with step by step working please
    12·1 answer
  • Write the equation of the line in slope intercept form given:<br> m = -6, b = 0
    8·1 answer
  • Diet coke is on offer at morrisons and sainsburys
    5·1 answer
  • Question
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!