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3 years ago

2X minus one equals five

Mathematics

2 answers:

stepan [7]3 years ago

7 0

2x-1=5
2(3)-1=5
6-1=5
5=5

x=3

Musya8 [376]3 years ago

5 0

2x and x are like. Terms so subtract 1 from both sides answer is x =6

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An astronaut on the moon throws a baseball upward. The astronaut is 6 ft 6 in tall, and the initial velocity of the ball is 40 f

weqwewe [10]

Answer:

t = 0.293 s and 14.52 s

Step-by-step explanation:

The heights of the ball in feet is given by the equation as follows :

$S = -2.7t^2+40t+6.5$

Where t is the number of seconds after the ball was thrown.

We need to find is the ball 18 ft above the moon's surface.

Put S = 18 ft

$-2.7t^2+40t+6.5=18\\\\-2.7t^2+40t=18-6.5\\\\-2.7t^2+40t-11.5=0$

It is a quadratic equation. Its solution is given by :

$t=\dfrac{-40+\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)},\dfrac{-40-\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)}\\\\t=0.293\ s,14.52\ s$

So, the ball is at first 0.293 s and then 14.52 s above the Moon's surface.

8 0

3 years ago

Ede4ka [16]

Answer:

5 percent per annum

Step-by-step explanation:

interest rate:

interest: $1800

principal: $18000

duration: 2 years

1800/ 18000 * 100

result is 10%

Since interest is 10% in 2 years, 10% / 2

interest is 5% per year.

8 0

3 years ago

NEED HELP FAST:

Irina-Kira [14]

Answer:

B- 5 5/6

Step-by-step explanation:

35 divided by 6 is 5 meaning there are 5 whole numbers in the fraction you then figure out how many 6 the remaining amount is which in this case is 5 so the answer is 5 5/6 hope this helps!

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3 years ago

Jamie owns 150 baseball cards. Mason owns 96 baseball cards. What the number of Mason's cards written as a percent of Jamie's ca

Marina CMI [18]

Answer:

64%

95/150 Or 64%

7 0

3 years ago

Read 2 more answers

Hi please help and show how you got to your answer! Thank you

Phoenix [80]

Answer: PQ=15

Step-by-step explanation:

XY=(PQ+SR)/2

PQ+SR=2*XY

PQ+35=2*25

PQ+35=50

PQ=15

4 0

2 years ago