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2 years ago

Find an expression which represents the sum of (10x−7y) and (7x-8y) in simplest terms.

Mathematics

1 answer:

Juli2301 [7.4K]2 years ago

8 0

Answer:

17x - 15y

Step-by-step explanation:

(10x - 7y) + (7x -8y)

17x - 15y

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What is the distance between the following points? A 12 B 13 C 36 D 97

Nookie1986 [14]

Answer:

Step-by-step explanation:

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2 years ago

What is the order pair for the orgin

lozanna [386]

The ordered pair that describes the origin is (0, 0).
That's because x=0 and y=0 at the origin.

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3 years ago

The probability that a lab specimen contains high levels of contamination is 0.15. A group of 4 independent samples are checked.

Lady bird [3.3K]

Answer:

0.5220

Step-by-step explanation:

Since the probability of contamination is 0.15, the probability of no contamination is 1 - 0.15 = 0.85

The probability that they are all contaminated will be 0.85 * 0.85 0.85 * 0.85 = 0.52200625

This is 0.5220 to four decimal

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2 years ago

Two numbers are 10 units away in different directions from their midpoint, m, on a number line. The product of the numbers is –9

irinina [24]

In my opinion the answer is m2 – 100 = –99
proof
m2 – 100 =(m – 10)(m + 10)
for eg. m=1, (-9)(11)= –99

4 0

2 years ago

Read 2 more answers

How can csc^2-cot^2 = 1?

Softa [21]

ANSWER

By simplifying the left hand side using the Pythagorean Identity.

EXPLANATION

The given identity is

$\csc^{2} (x) - \cot^{2} (x) = 1$

Take the left hand side and simplify to get the right hand side.

$\csc^{2} (x) - \cot^{2} (x) = \frac{1}{\sin^{2} (x)} - \frac{ \cos^{2} (x)}{\sin^{2} (x)}$

Collect LCM for the denominators.

$\csc^{2} (x) - \cot^{2} (x) = \frac{1 - \cos^{2} (x)}{\sin^{2} (x)}$

Recall the Pythagorean Identity.

$\cos^{2} (x) + \sin^{2} (x) = 1$

This implies that:

$1 - \cos^{2} (x) = \sin^{2} (x)$

We substitute this to get,

$\csc^{2} (x) - \cot^{2} (x) = \frac{\sin^{2} (x)}{\sin^{2} (x)}$

$\csc^{2} (x) - \cot^{2} (x) = 1$

6 0

2 years ago