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2 years ago

PLEASE HURRY!

Mathematics

2 answers:

Mkey [24]2 years ago

8 0

Answer:

51.75ft

Step-by-step explanation:

hope this helps

9x6=54

1.5x1.5=2.25

54-2.25=51.75

Nutka1998 [239]2 years ago

7 0

Answer: 51 sq ft

Step-by-step explanation: 1.5*1.5=3 9*6=54 54-3=51

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An algebra test contains 38 problems. Some of the problems are worth 2 points each. The rest of the questions are worth 3 points

Naily [24]

Let 'x' be the problems worth 2 points.

Let 'y' be the problems worth 3 points.

Since, there are 38 total problems.

So, $x+y =38$ (equation 1)

x = 38-y

Since, a perfect score is 100 points.

So, $2x+3y = 100$ (equation 2)

Substituting the value of 'x', we get

$2(38-y)+3y=100$

$76-2y+3y=100$

$76+y = 100$

y = 24

x+y = 38

x = 38-24 = 14

So, 14 problems are worth 2 points and 24 problems are worth 3 points.

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3 years ago

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The probability that Carmen will get an A on her math test is 80%, and the probability that she will get an A on her science tes

VLD [36.1K]

Answer:

70%

Step-by-step explanation:

60+80=140

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3 years ago

In the right ΔABC, AN is the altitude to the hypotenuse. Find BN, AN, and AC, if AB=2√5 in and NC= 1 in.

kipiarov [429]

Answer:

$BN=4\ \text{in}$

$AN=2\ \text{in}$

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Step-by-step explanation:

Let $BN=x$

$BC=c$

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$AC=b$

We have the relation

$\dfrac{BC}{AB}=\dfrac{AB}{BN}\\\Rightarrow \dfrac{c}{a}=\dfrac{a}{x}\\\Rightarrow c=\dfrac{a^2}{x}\\\Rightarrow x+1=\dfrac{a^2}{x}\\\Rightarrow x^2+x=20\\\Rightarrow x^2+x-20=0\\\Rightarrow x=\frac{-1\pm \sqrt{1^2-4\times 1\times \left(-20\right)}}{2\times 1}\\\Rightarrow x=4,-5$