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
Andrew [12]
3 years ago
12

Solve for x -3 - 8 = 10 A) -54 B) -6 C) 6 D) 54

Mathematics
1 answer:
marin [14]3 years ago
4 0

Answer:

x = 21

Step-by-step explanation:

x -3 - 8 = 10

Combine like terms

x-11 = 10

Add 11 to each side

x-11+11 =10+11

x = 21


You might be interested in
Involves sine/cosine rules
katen-ka-za [31]

Answer:

44.47 cm² (nearest hundredth)

Step-by-step explanation:

Area of ΔABC = 1/2 x base x height

⇒ 21 = 1/2 x 7 x BC

⇒ BC = 6 cm

Pythagoras' Theorem: a² + b² = c²

(where a and b are the legs, and c is the hypotenuse, of a right triangle)

⇒ AB² + BC² = AC²

⇒ 7² + 6² = AC²

⇒ AC² = 85

⇒ AC = √85 cm

Cosine rule to find length AD:

      c² = a² + b² - 2 ab cosC

⇒ DC² = AD² + AC² - 2(AD)(AC)cos(DAC)

⇒ 9.2² = AD² + (√85)² - 2(AD)(√85)cos 73°

⇒ AD²  - 5.39106...AD + 0.36 = 0

⇒ AD = 5.323442445, 0.06762541414

⇒ AD = 5.323442445

Area of a triangle ADC: (1/2)absinC

(where a and b are adjacent sides and C is the angle between them)

⇒ area = (1/2) × AC × AD × sin(DAC)

⇒ area = (1/2) × √85 × 5.323442445 × sin(73°)

⇒ area =23.4675821... cm²

Area of quadrilateral = area of ΔABC + area of ΔADC

                                   = 21 + 23.4675821...

                                   = 44.47 cm² (nearest hundredth)

4 0
2 years ago
Solve the system.<br><br> {y=5/6x+1<br> {−x+y=2
astraxan [27]
You can substitute the value of y(5/6 x + 1) from the first equation for y in the second and get -x + ( \frac{5}{6} x+1) = 2&#10; which becomes - \frac{1}{6} x + 1 -1=2-1&#10; and you get 
3 0
4 years ago
Read 2 more answers
Simplify the expression and SHOW YOUR WORK, please.<br><br> 10h+6-5h+3
irinina [24]

<u><em>5h+9 is the right answer. </em></u> First you had to used group like terms, and it gave us, 10h-5h+6+3. Then add similar elements, and it gave us, 10h-5h=5h, or 5h+6+3. Finally, you had to add by the numbers, and it gave us, 6+3=9, or and it gave us the answer is 5h+9 is the right answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie

5 0
3 years ago
The ratio of koalas to gum trees is 1 : 3. There are 252 gums trees now. Plans are being made to increase this number to 345. Fi
Advocard [28]
I would be happy to help!

To start off you need to find the amount of koalas there are at the current number of trees by using the ratio one to 3 which means there is one koala for every 3 gum trees. So you need to devide 252 by 3 giving you the answer of 84 koalas currently. Now you nees to find how many koalas there are for the future 345 trees based on the same ratio 1 to 3. This would give you 115 koalas to be expected in the future. Finally to find the amount of koalas increaed you need to subtract 84 from 115 giving you a final answer of 31 koalas.
7 0
4 years ago
Please put yes or no asap happy ramadan if u celebrate
Ray Of Light [21]

Answer:

Parallelogram: Yes

Rectangle: No

Quadrilateral: Yes

Pentagon: No

Step-by-step explanation:

HAPPY RAMADAN TO YOU TOO :)

and have you heard of counting stars

4 0
3 years ago
Other questions:
  • Use the Law of Sines to solve the triangle. Round your answers to two decimal places.
    14·1 answer
  • I need help, so can I get help please???​
    13·1 answer
  • Solve the following equation for n m=n-15
    15·1 answer
  • Parallel and Transversal Lines
    7·1 answer
  • (e) 3x2 + 10x + 3 by x + 3<br>​
    13·1 answer
  • What is the slope of the line
    7·1 answer
  • Alonzo is making apple tarts for a party. He needs 3 apples for every 8
    8·2 answers
  • Which inequality represents this statement?
    11·1 answer
  • There are 40 coins in a roll of quarters. The change machine at the local arcade holds 320 rolls of quarters. How many quarters
    5·1 answer
  • If you pay for $48.02 item with a $50 how much change will you get back?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!