3 years ago

Any help please!!!!!! Please help

Mathematics

1 answer:

belka [17]3 years ago

6 0

38 mm^2
Hope this helps

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Is 4/5 equal to 8/9? Explain please! PS I just put in a random fraction I did not know if it was equal or not.

natita [175]

8/10 because equal fractions have to be multiplied by 2

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4 years ago

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Find the slope of a line parallel to the line through the given points. P(-2, 4), Q(6, -2) 4/3 3/4 -3/4

Galina-37 [17]

Answer:

slope = - $\frac{3}{4}$

Step-by-step explanation:

Parallel lines have equal slopes thus the slope of a parallel line will be equal to the slope of PQ

To calculate slope m use the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = P(- 2, 4) and (x₂, y₂ ) = Q(6, - 2)

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F(x) = 7 - 5x + 7x2<br> find f(-9)

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Answer:

Step-by-step explanation:

F(x) = 7 - 5x + 7x²

f(-9) = 7 - 5*(-9) + 7*(-9)²

= 7 + 45 + 7*81

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3 years ago

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Use the quadratic formula to answer the question below.

ra1l [238]

Answer:

x = -2.32, 10.32 to the nearest hundredth.

Step-by-step explanation:

x^2 - 8x - 24 = 0

x = [ - (-8) +/- sqrt (((-8)^2 - 4*1*(-24)] / 2

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3 years ago

To compare two products such as colas, a random sample is selected to taste two types of colas (A and B). Each selected subject

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Answer: The sample size would be needed = 385

Step-by-step explanation:

Let p be the prior population proportion.

Margin of error = E

When not estimate of p is given , the formula to calculate the minimum sample size <em>n</em> = $0.25(\dfrac{z^*}{E})^2$ , where z* = critical value for given confidence interval.

Here z* for 95% confidence level is 1.96.

E=5%=0.05

Then $n=0.25(\dfrac{1.96}{0.05})^2\approx385$

Hence, the sample size would be needed = 385

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3 years ago