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2 years ago

I nee d some help pls

Mathematics

2 answers:

polet [3.4K]2 years ago

7 0

Answer:

x = 7

Step-by-step explanation:

4x - 9 = 2x + 5

2x - 9 = 5

2x = 14

x = 7

mr_godi [17]2 years ago

3 0

IT IS 2!!!!!!!!!!!!!!!!

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Which polynomial is equal to (x + 1)(2x + 1)

VladimirAG [237]

Answer:

2x^2+3x+1

Step-by-step explanation:

FOIL

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2 years ago

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At the movie theatre, child admission is $5.20 and adult admission is $8.60. On Sunday, 132 tickets were sold for a total sales

xxMikexx [17]

Answer:

60 tickets for children were sold

Step-by-step explanation:

Let x be the number of sold children's tickets and let y be the number of adult tickets sold, then we can pose the following equations.

$x + y = 132$ (i) Because 132 tickets were sold in total

$5.20x + 8.60y = 931.20$ (ii) because the total of $ obtained by sales was 931.20.

We must clear x. Then we substitute (i) in (ii)

$5.20x +8.60(132-x) = 931.20$

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$-3.4x = -204$

$x = 60$

60 tickets for children were sold

7 0

2 years ago

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Find the line through

Kaylis [27]

Answer:

$(\frac{1}{2},\frac{-1}{2},\frac{1}{2})$

Step-by-step explanation:

We have been given the intersection coordinates:

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From the condition of perpendicularity we know:

$(7,1,-6)(x,y,z)$

$\Rightarrow 7x+y-6z=0$

Now, we have given x=-1+t , y=-2+t and z= -1+t

$7(-1+t)+(-2+t)-6(-1+t)=0$

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$\Rightarrow -3+2t=0$

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Now, substituting t in the given coordinates x,y and z we get:

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And $z=-1+\frac{3}{2}=\frac{1}{2}$

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2 years ago

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The head of a computer science department is interested in estimating the proportion of students entering the department who wil

olya-2409 [2.1K]

Answer:

Step-by-step explanation:

From the given information:

At 95% Confidence interval level,Level of significance $\alpha$ 0.05, the value of Z from the standard normal tables = 1.96

Margin of Error = 0.10

Let assume that the estimated proportion = 0.5

therefore; the sample size n can be determined by using the formula: $n =(\dfrac{Z}{E})^2 \times p\times (1-p)$

$n =(\dfrac{1.96}{0.1})^2 \times 0.5\times (1-0.5)$

$n =(19.6)^2 \times 0.5\times (0.5)$

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8 0

3 years ago

PLZ HELP!!! WILL GIVE BRAINLIEST

omeli [17]

A) A rational number that is between 9.5 and 9.7 could be 9.6 because it can be written as a fraction (in this case 9 6/10 or 9 3/5)

B) An irrational number could be the square root of 91 because it's value cannot be written as a fraction, as with all other square roots of non-perfect squares. sqrt(91) is about 9.54 rounded to the nearest hundredth.

Hope this helped!

7 0

2 years ago