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3 years ago

Simplify the expression below. 21 - 5² - 49

Mathematics

1 answer:

wariber [46]3 years ago

7 0

Answer:

The positive answer is 3 and the negative one is -53

Step-by-step explanation:

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Solve the equation. Round to the nearest hundredth. Show work.

Burka [1]

Answer:

$x=-0.75$

Step-by-step explanation:

The given equation is

$4^{-5x-7}=6^{2x-1}$

We take logarithm of both sides to base 10.

$\log(4^{-5x-7})=\log(6^{2x-1})$

$(-5x-7)\log(4)=(2x-1)\log(6)$

We expand the brackets to get;

$-5x\log(4)-7\log(4)=2x\log(6)-\log(6)$

Group similar terms;

$-7\log(4)+\log(6)=2x\log(6)+5x\log(4)$

$-7\log(4)+\log(6)=(2\log(6)+5\log(4))x$

$\frac{-7\log(4)+\log(6)}{(2\log(6)+5\log(4))}=x$

$x=-0.752478$

To the nearest hundredth.

$x=-0.75$

3 0

3 years ago

Show that 4/9 - 1/6 = 5/18

ludmilkaskok [199]

Answer:

Step-by-step explanation:

4/9-1/6=5/18

5 0

3 years ago

Read 2 more answers

Richard walks every day for exercise at a rate of 1 kilometer every 20 minutes.

OleMash [197]

Answer:

3000 meters

Step-by-step explanation:

1 kilometer = 1000 meters

1 kilometers = every 20 minutes

3× 1000 meters= 20 min ×3

3000 meters = 60 min/ 1 hour

7 0

3 years ago

A right triangle has an angle that measures 13.9 degrees. What is the missing angle measure?

AleksAgata [21]

Answer:

76.1

Step-by-step explanation:

8 0

2 years ago

Molly runs each morning once around a circular path in her neighborhood. if the diameter of the path is 1.4 miles, how far does

Lemur [1.5K]

To work out the distance of the path, you need to find out the circumference.
Formula for circumference = pi multiplied by the diameter

So you simply do:
pi multiplied by 1.4 miles

And you should get:
4.39822971503... miles

Simply round the result to an appropriate value (e.g. 3 decimal places).

Answer: 4.398 miles (to 3dp)
Hope the answer helps :)

6 0

3 years ago