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atroni [7]
3 years ago
10

Find (3a2 - 2a + 4) - (a2 - 3a + 7) .

Mathematics
1 answer:
melisa1 [442]3 years ago
6 0
<span>(3a^2 - 2a + 4) - (a^2 - 3a + 7) = (distribute the negative sign)
3a^2 - 2a +4 - a^2 + 3a - 7 = (add like terms)
2a^2 + a - 3
So, the answer is A!

</span>
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3 years ago
Find the surface area of polyhedra <br>Pls!! show how you got the surface area ​​
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Answer:

52.48

Step-by-step explanation:

find the cross sectional area which is the triangle

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then, use the area to multiply by the extended length of 2

26.24 x 2 = 52.48

4 0
3 years ago
Please help me on what the next 3 terms would be
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5 0
4 years ago
How many milliliters of 0.30%. sugar solution must you add to 75 mL of 4% sugar solution to get a 0.50% sugar solution? show you
LekaFEV [45]
<span>We have 75 mL of 4% sugar solution.
We have to add a 30% sugar </span><span>solution to make a 50% </span><span>sugar solution.
75 * .04 + .30x = .50 * (75 +x)
3 + .30x = 37.5 +.50x
I can't get the equation to solve.
Did you type it correctly? For one thing, you have the percentages typed as .30 % and 4%.  Are the decimal places in the correct positions?

Also, no matter how much 30% sugar solution you add, it will NEVER increase to 50%.


</span>
6 0
3 years ago
Pls help due today click on photo to see the rest
marissa [1.9K]

Answer:

1. r=9; 2. r=14.5; 3. d=42; 4. d=26; 5. c=131.88; 6. c=34.54; 7. c=25.12; 8. c=28.26; 9. c=43.96; 10. c=197.82; 11. c=263.76; 12. c=94.2; 13. c=97.34; 14. c=138.16; 15.47.1; 16. c=285.7; 17. c=1.57

Hope this helps!

8 0
3 years ago
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