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gregori [183]
4 years ago
15

Two factors of 30 add up to 9

Mathematics
2 answers:
Alinara [238K]4 years ago
6 0
 6x5=30
3x10=30
6+3=9
Hope it helps
Afina-wow [57]4 years ago
4 0
There is no such thing
maybe check and see if it's a -9 or -30 
or
you may need to use quadratic equation [\frac{-b \frac{+}{-}  \sqrt{b^{2} -4(a)(c)} }{2(a)} ] which I would help but I don't know the whole equation

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Consider triangle abc what is the value of y in the triangle
Yakvenalex [24]

Answer:

y = 50

Step-by-step explanation:

All triangle angles add up to 180 degrees.

To set this equation up, you need to add everything given in the triangle and set it equal to 180:

y + y + 80 = 180

<em><u>Add like terms:</u></em>

2y + 80 = 180

<u><em>Subtract 80 from both sides:</em></u>

2y + 80 = 180

     - 80   - 80

___________

2y = 100

<u><em>Divide both sides by 2:</em></u>

y = 50

<u><em>If you're unsure, you can plug in the 50 for y:</em></u>

y + y + 80 = 180

50 + 50 + 80 = 180

100 + 80 = 180

180 = 180

4 0
3 years ago
Show full work to factor<br> 2x² + 5x-7
Paraphin [41]

Answer:

(2x+7)(x-1)

Step-by-step explanation:

2x²+5x-7

2x²+7x-2x-7

x(2x+7)-1(2x+7)

(2x+7)(x-1)

3 0
3 years ago
Tell what the difference is when you multiply or divide decimals by powers of ten by moving the decimal point.​
egoroff_w [7]

Answer:

The similar shortcut for division works because division is the opposite operation of multiplication—it “undoes” multiplication. If we move the decimal point to the right when multiplying by 10, 100, 1000 and so on, then it is quite natural that the rule for division would work the “opposite” way.

Step-by-step explanation:

7 0
2 years ago
Kelly sells ice cream bars at the beach. In addition to a fixed salary, she earns a commission for each ice cream bar she sells.
sergey [27]
If my math is right it would be y = 2x + 50<span>
</span>
8 0
3 years ago
Read 2 more answers
How many half-lives of radon-222 have passed in 11.46 days? If 5.2 × 10−8 g of radon-222 remain in a sealed box after 11.46 days
Svetach [21]

Answer:

(i) Approximately 3 half lifes

(ii) 4.21\times 10^{-7}\text{ g}

Step-by-step explanation:

(i) ∵ The half life of Radon-222 is approximately 3.8 days,

So, the number of half life in 11.46 days = \frac{11.46}{3.8} ≈ 3

(ii) Since, the half life formula is,

N=N_0 (\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}

Where,

N_0 = initial quantity,

t = number of periods

t_{\frac{1}{2}} = half life of the quantity,

Given,

N = 5.2\times 10^{-8}\text{ g}

t = 11.46 days,

t_{\frac{1}{2}} = 3.8\text{ days}

\implies 5.2\times 10^{-8}=N_0 (\frac{1}{2})^\frac{11.46}{3.8}

\implies N_0=2^{\frac{11.46}{3.8}}\times 5.2\times 10^{-8}\approx 4.21\times 10^{-7}\text{ g}

7 0
4 years ago
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