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dalvyx [7]
3 years ago
13

Answer asap only if you know

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
3 0
3x+2y=21

•add -2y to both sides
3x+2y=21
-2y -2y
3x= -2y+2y
•then divide both sides by 3
3x/3 = -2y+21/3
•your answer:
x=-2/3y+7


x-4y=-7

•add 4y to both sides
x-4y=-7
+4y +4y
•your answer:
x=4y-7
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Helpppppp mathhhhhhhhh
creativ13 [48]
I hope this helps you




cos71=15/P



0.325=15/P



P=46.15
8 0
3 years ago
Simplify the following surd expressions
olasank [31]

Answer:

<h2>see the answers ⤵️</h2>

Step-by-step explanation:

<h3>to understand the solving steps you need to know about</h3>
  • algebra
  • PEMDAS
  • redical
<h3>adding or subtracting with redical experience is nothing but algebraic addition or subtraction</h3><h3>let's solve:</h3>

a)7 \sqrt{3}  - 2 \sqrt{3}  +  \sqrt{3}  - 3\sqrt{3}  \\ 8 \sqrt{3}  - 5 \sqrt{3}  \\ 3 \sqrt{3}

b)5 \sqrt{7}   + 4 \sqrt{7}   - 8  \sqrt{7}  \\ 9 \sqrt{7}  - 8 \sqrt{7}  \\  \sqrt{7}

6 0
3 years ago
Read 2 more answers
4 2/3 divided by 2 3/6
natima [27]

4 2/3 divided by 2 3/6 divided with a calculator as a decimal would be 1.86666666667

8 0
3 years ago
Read 2 more answers
Could someone help me? The problems (see image attached) are about whether or not a decimal can be written as a question and why
Murrr4er [49]

Answer:

yes it can be bc it is repeating

5 0
1 year ago
Please help!!! I don’t get any of this can someone please explain what to do and how I can get my answer????
diamong [38]
Its just a matter of subbing ur numbers into the formula given
1. d = rt
    when r = 144 and t = 18
    now we sub
    d = 144 * 18
    d = 2592 <==
2. d = rt
    when r = 56 and t = 3.5
    sub
    d = 56 * 3.5
   d = 196 <==

3. A = L * W
    when L = 2 ft and W = 15 inches....this one u have to convert to     inches...2 ft = 24 inches...so L = 24 and W = 15
    A = 24 * 15
    A = 360 in^2 <==

4. A = L * W
    L = 3m and W = 32 cm...have to convert to cm.....1 m = 100 cm...so 3 m = 300 cm
    A = 300 * 32
    A = 9600 cm^2 <==

u basically do the same for all the others....its just a matter of subbing and solving
  
    
7 0
3 years ago
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