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yarga [219]
3 years ago
6

12 pts!! solve for x. 4/5 (2x + 5) − 4 =1

Mathematics
2 answers:
tensa zangetsu [6.8K]3 years ago
8 0
4/5 (2x + 5) − 4 =1
4/5(2x +5) = 1 +4
4/5 (2x +5) = 5
2x + 5 = 5 / (4/5)
2x + 5 = 5 (5/4)
2x + 5 = 25/4
2x = 25/4 - 5
2x = 25/4 - 20/4
2x = 5/4
x = (5/4) / 2
x = (5/4) (1/2)
x = 5/8
x = 0.625
seropon [69]3 years ago
7 0
Let's solve for f.<span><span><span><span><span><span><span><span>fo</span>r</span>x</span><span>(0.4)</span></span>5</span><span>(<span><span>2x</span>+5</span>)</span></span>−4</span>=1</span>Step 1: Add 4 to both sides.<span><span><span><span><span><span><span><span>0.16f</span>o</span>r</span><span>x2</span></span>+<span><span>25</span><span><span><span>fo</span>r</span>x</span></span></span>−4</span>+4</span>=<span>1+4</span></span><span><span><span><span><span><span>0.16f</span>o</span>r</span><span>x2</span></span>+<span><span>25</span><span><span><span>fo</span>r</span>x</span></span></span>=5</span>Step 2: Factor out variable f.<span><span>f<span>(<span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span>)</span></span>=5</span>Step 3: Divide both sides by (0.8orx^2+2orx)/5.<span><span><span>f<span>(<span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span>)</span></span><span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span></span>=<span>5<span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span></span></span><span>f=<span>25<span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span></span></span>Answer:<span>f=<span>25<span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span><span>x</span></span></span></span></span>
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What number must you add to complete the square?
Mila [183]

Answer:

D. 49

Step-by-step explanation:

When completing the square, you take the value after x^2 which is 14 and divide it by 2 which equals 7 for which you then square that number which 7 times 7 = 49

6 0
3 years ago
In a random sample of 300 attendees of a minor league baseball game, 182 said that they bought food from the concession stand. C
horrorfan [7]

Answer:

<em>90% confidence interval for the proportion of fans who bought food from the concession stand</em>

(0.5603,0.6529)

Step-by-step explanation:

<em>Step(i)</em>:-

<em>Given sample size 'n' =300</em>

Given data  random sample of 300 attendees of a minor league baseball game, 182 said that they bought food from the concession stand.

<em>Given sample proportion </em>

<em>                        </em>p^{-}  = \frac{x}{n} = \frac{182}{300} =0.606

level of significance = 90% or 0.10

Z₀.₁₀ = 1.645

<em>90% confidence interval for the proportion is determined by</em>

(p^{-} - Z_{0.10}\sqrt{\frac{p(1-p)}{n} }  , p^{-} +Z_{0.10}\sqrt{\frac{p(1-p)}{n} })

(0.6066 - 1.645\sqrt{\frac{0.6066(1-0.6066)}{300} }  ,0.6066+1.645\sqrt{\frac{0.6066(1-0.6066)}{300} })

(0.6066 -  0.0463  ,0.6066 +  0.0463)

(0.5603,0.6529)

<u>final answer</u>:-

<em>90% confidence interval for the proportion of fans who bought food from the concession stand</em>

(0.5603,0.6529)

5 0
3 years ago
Molly charges an hourly fee to watch a pet plus an initial fee
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Answer:

he has 140 chickens because he has 10 times more chickens than ducks and he has 14 ducks so 14*10=140

Step-by-step explanation:

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Solve using square roots
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4 years ago
Please help and hurry!
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A is the best answer…

Work:

-10x-(-4y) will equal -10x+4y the minus minus will cancel out

Please like and brainiest
6 0
3 years ago
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