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
SVETLANKA909090 [29]
4 years ago
12

5a – 10b = 45, when b = 3?

Mathematics
2 answers:
larisa [96]4 years ago
8 0

If b = 3, and 5a - 10b = 45. Then "a" must be......

Okay, so let's plug in what we know:  5a - 10 x 3 = 45   or    5a - 30 = 45

We now know that 5a = 30 + 45  or  5a = 75

Then, divide:  75 / 5 = 15

a = 15!

KonstantinChe [14]4 years ago
5 0

5a - 10 * 3 = 45

5a - 30 = 45

5a = 75

a = 75 : 5

a = 15

You might be interested in
3
anyanavicka [17]

Answer:

132.7 feet.

Step-by-step explanation:

tan 37 = height of cliff / distance of the ship

=  100/d

d = 100/tan37

= 132.7 feet.

4 0
3 years ago
A t-shirt costs $12. You have a 25% off coupon. How much will the t-shirt cost?
AlekseyPX

Answer:

The shirt would be $9 dollars because $3 dollars is 25% of 12.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The cruise control feature on a car is set to maintain a speed of 65 miles per hour. The car’s actual speed never varies by more
lyudmila [28]
(3x)65 would be the answer because the speed doesn't vary much
4 0
4 years ago
What statement makes the open sentence 3x+9=24 true? A. X=3 B. X=5 C.X=11 D.X=15
tatyana61 [14]
The answer would be B) x=5 because 3 times 5 = 15 then add 9 to get 24.
3 0
3 years ago
PLEASE HELP I NEED TO GET THIS DONE ASAP !!!!!
Rzqust [24]

Answer:

  • 50.27 cm²

Step-by-step explanation:

<u>Shaded area is the difference in the areas of big and small circles.</u>

  • Circle area formula: A = πr²
  • A = π(5²) - π(3²) = π(25 - 9) = 16 π = 50.2654824574 ≈ 50.27cm²
8 0
3 years ago
Read 2 more answers
Other questions:
  • What substitution should be used to rewrite 4x^4-21x^2+20=0 as a quadratic equation
    7·2 answers
  • The graph shows the amount of water that remains in a barrel after it begins to leak. The variable x represents the number of da
    11·2 answers
  • without doing any calculations or modeling, explain how you know that the 24 inch by 32 inch mirror and the 20 inch by 32 inch m
    5·1 answer
  • The game of backgammon uses two standard dice, each with the numbers one through six. You need to roll double 5's to win the gam
    8·1 answer
  • I need help with this math question
    10·1 answer
  • Please help me ill brainlist and give 15 points-
    6·2 answers
  • Hailey rolls a twelve sided die, to choose a random number from one to twelve. What is the probability that the number hailey ro
    14·1 answer
  • ABCDE~GHJDF Complete the following statements
    9·1 answer
  • WILL MARK BRAINLIEST
    14·1 answer
  • A building has 12 floors above ground level and 4 floors below ground level. The elevator stops 2 floors below ground level. Wha
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!