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3 years ago

Help plz ;~; this is so hard

Mathematics

2 answers:

Katyanochek1 [597]3 years ago

8 0

Answer:

x = 29.15

Step-by-step explanation:

a^2 + b^2 = c^2

15^2 + 25^2 = 890

square root of 850 is 29.154759....

AlexFokin [52]3 years ago

8 0

Answer:

The correct answer is 30.

Step-by-step explanation:

To find this out I found the fraction of 6 and 8 to 10. This is 3/5 and 4/5 to find x on the other triangle all I had to do was multiply 25 times 1 1/5. Sorry for the bad explanation it was kind of confusing to word but I hope this helps!

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What is the difference between the 5th multiple of 7 and 3rd multiple of 2 ?

lesya692 [45]

Answer:

<h3>5th Multiple of 7 = 35</h3><h3>3rd Multiple of 2 = 6</h3><h2>The Difference</h2>

=> 35-6

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3 years ago

Which choice does not name a chord of circle F?

andreyandreev [35.5K]

A, FE as a chord is a straight line that goes from one end of the circle to another end. This means both ends of the line should touch the circumference. In FE, only one end of the line is touching the circumference. The other isn't. There FE isn't a chord for circle F

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4 years ago

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Find the seventh term of the geometric sequence 1, 2, 4, ... and the sum of the first seven terms. t7= S7=

IrinaK [193]

Answer:

Seventh term is 64

Sum of the first seven terms is 127

Step-by-step explanation:

The common ratio is 2

$a_{n} = a_{1} r^{n - 1}$

n = 7 and the first term is 1. So,

$a_{7} = 1(2^{7 - 1} ) = 2^{6} = 64$

Seventh term is 64

$S_{n} = \frac{a_{1} (r^{n} -1)}{r - 1}$

$S_{7} = \frac{1(2^{7} -1)}{2 - 1}$

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Sum of the first seven terms is 127

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3 years ago

Which equation has infinitely many solutions? *

ivanzaharov [21]

Answer:

Your answer is D.

B and C have no solution and the soultion to A is 2

Step-by-step explanation:

I did it on a calcultor

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3 years ago

Squaring both sides of an equation is irreversible. Is Cubing both sides of an equation reversible? Provide numerical examples t

nikitadnepr [17]

Answer:

<h2>Cubing both sides of an equation is reversible.</h2>

Step-by-step explanation:

Squaring both sides of an equation is irreversible, because the square power of negative number gives a positive result, but you can't have a negative base with a positive number, given that the square root of a negative number doesn't exist for real numbers.

In case of cubic powers, this action is reversible, because the cubic root of a negative number is also a negative number. For example

$\sqrt[3]{x} =-1$

We cube both sides

$(\sqrt[3]{x} )^{3} =(-1)^{3} \\x=-1$

If we want to reverse the equation to the beginning, we can do it, using a cubic root on each side

$\sqrt[3]{x}=\sqrt[3]{-1} \\\sqrt[3]{x}=-1$

There you have it, cubing both sides of an equation is reversible.

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3 years ago