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3 years ago

Whats 2x-15=20? best answer plez

Mathematics

1 answer:

Novosadov [1.4K]3 years ago

4 0

Answer:

x= 17.5

Step-by-step explanation:

add 15 on both sides

divide 2 on both sides after

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Which type of sequence is shown? Check all that apply. 4, 8, 12, 16, . . . The numbers are quickly getting larger, so this is a

melisa1 [442]

Step-by-step explanation:

4, 8 , 12 , 16 .....

This is an arithmetic sequence because there is a common difference of 4 between each term.
This is a geometric sequence because there is a common ratio of 2 between each term.

Hope it will help.

7 0

3 years ago

Is –2,823,680 − 8,957,599 positive or negative?

Scrat [10]

Answer:

negative

Step-by-step explanation: it has negative signs

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3 years ago

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Simplify sin^2y/sec^2 y−1 to a single trigonometric function

liubo4ka [24]

Answer:

$\frac{ { \sin}^{2} y}{ { \sec}^{2}y - 1 } = { \cos }^{2} y$

Step-by-step explanation:

We know that ${ \tan }^{2} y = { \sec }^{2} y - 1$

Also , ${ \tan}^{2} y = \frac{ { \sin }^{2} y}{ { \cos }^{2}y }$

So ,

$\frac{ { \sin }^{2}y }{ { \sec }^{2}y - 1 } = \frac{ { \sin}^{2} y}{ { \tan }^{2} y} = \frac{ { \sin }^{2}y }{ \frac{ { \sin}^{2} y}{ { \cos}^{2}y } } = { \cos }^{2} y$

6 0

3 years ago

F(x) = 5x - 3 for x = -7

erastovalidia [21]

Answer:

Step-by-step explanation:

f(-7) = 5(-7) - 3 = -35 - 3 = -38

6 0

4 years ago

Few students manage to complete their schooling without taking a standardized admissions test such as the Scholastic Achievement

slega [8]

Answer:

Step-by-step explanation:

Assuming there is a punitive removal of one point for an incorrect response.

Five undiscernable choices: 20% chance of guessing correctly -- Expectation: 0.20*(1) + 0.80*(-1) = -0.60

Four undiscernable choices: 25% chance of guessing correctly -- Expectation: 0.25*(1) + 0.75*(-1) = -0.50

I'll use 0.33 as an approzimation for 1/3

Three undiscernable choices: 33% chance of guessing correctly -- Expectation: 0.33*(1) + 0.67*(-1) = -0.33 <== The approximation is a little ugly.

Two undiscernable choices: 50% chance of guessing correctly -- Expectation: 0.50*(1) + 0.50*(-1) = 0.00

And thus we see that only if you can remove three is guessing neutral. There is no time when guessing is advantageous.

One Correct Answer: 100% chance of guessing correctly -- Expectation: 1.00*(1) + 0.00*(-1) = 1.00

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3 years ago