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devlian [24]
3 years ago
8

Nancy and Kevin collect coins. Nancy has x coins. Kevin has nine coins fewer than three times the number of coins Nancy has. Wri

te and simplify an expression for the total number of coins Nancy and Kevin have.
Mathematics
2 answers:
jarptica [38.1K]3 years ago
6 0

Answer:

its a and then c.

Step-by-step explanation:

Korolek [52]3 years ago
5 0
Expression: 3x-9 + x
simplified: 4x+9
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Need help on 9 don’t know if I did it right or not but I need help :p
solmaris [256]

Answer:

9b) -8 = y

9a) 72° = <em>m</em>∠<em>ABC</em>

Step-by-step explanation:

Since you have an angle trisector, in this case, <em>m</em>∠<em>CBE</em><em> </em>≅ <em>m</em>∠<em>DBA,</em><em> </em>therefore you <em>set</em><em> </em><em>x</em><em> </em>equal to 8, plus, according to Morley's Trisector Theorem, all three angles form an equilateral triangle, so <em>m</em>∠<em>BOC</em><em> </em>also has to equal 24°:

{8}^{2}  - 5(8) = 64 - 40 = 24 \\  \\ 6(8) - 24 = 48 - 24 = 24 \\  \\ 2(8) - y = 24 >> 16 - y = 24 >>  -8 = y

Then, <em>m</em>∠<em>ABC</em><em> </em>comes from multiplying 3 by 24 [three <em>twenty-</em><em>four</em>'s], which results in 72°.

I am joyous to assist you anytime.

4 0
3 years ago
How does place value help you add decimal
gladu [14]
You line up the decimal points so that similar place values are lined up. it will be easier to add them.
3 0
3 years ago
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Solve for x -4x-1=3 i dont know why ive been stuck on this
In-s [12.5K]

Answer:

x=-4/3

Step-by-step explanation:

x -4x-1=3

-3x-1=3

-3x-1+1=3+1

-3x=4

-3x/3 = 4/-3

x=-4/3

I hope this helps!

3 0
3 years ago
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Simplify.<br> 10u -4u<br> Please help
vovikov84 [41]

Answer:

6u

Step-by-step explanation:

The two terms 10u and 4u are like terms because they both carry the same variable (u) with the same degree (1). So, we can just subtract them as if they were normal numbers 10 - 4:

10u - 4u = 6u

Thus, the answer is 6u.

Hope this helps!

8 0
3 years ago
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What is the equation of the quadratic graph with a focus of (3, 6) and a directrix of y = 4? f(x) = one fourth (x − 3)2 + 1 f(x)
mina [271]
 Let point (x, y) be any point on the graph, than the distance between (x, y) and the focus (3, 6) is sqrt((x - 3)^2 + (y - 6)^2) and the distance between (x, y) and the directrix, y = 4 is |y - 4|

Thus sqrt((x - 3)^2 + (y - 6)^2) = |y - 4|
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x^2 - 6x + 9 + y^2 - 12y + 36 = y^2 - 8y + 16
x^2 - 6x + 29 = -8y + 12y = 4y
(x - 3)^2 + 20 = 4y
y = 1/4(x - 3)^2 + 5

Required answer is f(x) = one fourth (x - 3)^2 + 5
8 0
3 years ago
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