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
Fed [463]
3 years ago
5

5a – 10b = 45, when b = 3

Mathematics
2 answers:
Sergeeva-Olga [200]3 years ago
7 0
5a - 10b = 45 when b = 3, then

5a - (10*3) =45
5a - 30 = 45
5a = 45+ 30
5a = 75
a = 75/5
a =15
balandron [24]3 years ago
6 0


Well, since you have the value of b, the first thing you want to do is substitute that value in for b.

5a - 10(3) = 45

10*3 = 30

5a - 30 = 45

Now, to get the variable by itself (a) you have to + 30 because you have to reverse the subtraction.

5a = 75

Now, you divide by 5 to finish getting a by itself.

a = 15

Hope this helps!

You might be interested in
Can someone help<br><br> Write an equivalent expression for<br> 63.62.65.6.
Otrada [13]

When multiplying the same number raised to different powers add the powers together.

3 + 2 + 5 = 10

Because you are also multiplying a value without a power you need to add 1 to the sum of the powers:

10 + 1 = 11

Answer: 6^11

5 0
3 years ago
A group of 12 students is deciding whether to go to the science center or the zoo. Science center tickets are 3 for $36.75 and z
Liono4ka [1.6K]

Answer:

use math papa

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A recipe for chocolate chip cookies mixes 512 cups of cookie dough with 34 cup of chocolate chips and makes 48 cookies. A baker
kvasek [131]

Answer:

2

Step-by-step explanation:

3 0
3 years ago
NEED HELP ASAP IM GIVING YOU ALL MY POINTS (DONT COME HERE FOR POINTS OR SCAM I WILL REPORT YOU) COME HERE IF YOU KNOW THIS I WI
telo118 [61]

Answer:

I usseme you already got this answer

8 0
3 years ago
Need help with this please ​
antoniya [11.8K]

Answer:

These are kinda tuff  Mandi,  sooo remember what's below

Step-by-step explanation:

Use SOH CAH TOA to recall how the trig functions fit on a triangle

SOH: Sin(Ф)= Opp / Hyp

CAH: Cos(Ф)= Adj / Hyp

TOA: Tan(Ф) = Opp / Adj

now fine one of the above functions that has the 3 things you are working with.   2 knowns, and 1 unknown

also we know that the angle at the right tip of the triangle is 90-59= 31°

we know that b/c the inside angles of a triangle always add to 180 and there is already a 90° so we only have 80 left, which the 59° is part of, so 31 is the other, now put that info into one of the above formulas

x= adjacent side

and we know the angle and hypotenuse side.    find the formula with those parts.  I see Cos  has those or CAH... to help remember how those fit

Cos(31) = x / 17

17*cos(31) = x

14.5718 = x

there is your answer,  understand how I got it? :)

4 0
3 years ago
Other questions:
  • Simplify and give term,coefficient,and constant for each one
    7·2 answers
  • Is Y=7x+2;(2,0) a solution or equation
    8·1 answer
  • Jasmine works in Lower Beauvale and arrives at the station at 5.20 p.m. If she catches the next available train to Common Top, w
    6·2 answers
  • If a number is divided by eleven, the solution is two-fifths. What is the number?
    15·2 answers
  • Help me pleaseeee!!!
    9·1 answer
  • Find the volume of this prism
    12·1 answer
  • Annie has 4 1/2 feet of rope what is the greatest number of 3/4 foot pieces that annie can cut from the rope
    5·1 answer
  • 100 POINTS!! needs to be correct!
    5·2 answers
  • Find the volume of this triangular prism.<br> 6 cm<br> 7 cm<br> 10 cm
    15·1 answer
  • Find the missing side length of the right triangle. show work.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!