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3 years ago

Please help me it needs to be correct

Mathematics

2 answers:

son4ous [18]3 years ago

7 0

Answer is 20m + 8.
all you need to do is add the like terms ;)

dimaraw [331]3 years ago

6 0

Answer:

4(3m^3-2m^2+4m+2)

Step-by-step explanation:

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I need help on this math question

Mrrafil [7]

Answer:

the answer is 9

Step-by-step explanation:

x=9 and w=9 making it 18, so if x=9 then v=7 because 7+9=16

7 0

3 years ago

Convert the measurement. Help me ASAP please

sdas [7]

22.86 cm is the answer

5 0

3 years ago

Simplify each of the expressi<br> 1) (5p2 – 3) + (2p2- 3p)

prohojiy [21]

Answer:

7p^2 - 3p - 3

Step-by-step explanation:

the simplified version of the expression is 7p^2 - 3p - 3

4 0

3 years ago

element x is a radioactive isotope such that every 32 years, its mass decreases by half. given that the initial mass of the samp

VashaNatasha [74]

Answer:

the answer is 31.9 years

Step-by-step explanation:

initial mass, $M_{0}$ = 150 gram

half life, $t_{half\hspace{0.1cm}life}$ = 32 years

new mass = half of initial mass = M = 0.5 $M_{0}$

formula , M = $M_{0}$ $e^{\frac{\ln\frac{1}{2}}{t_{half} }\times x }$ where x is the number of years required.

therefore 0.5 $M_{0}$ = $M_{0}$ $e^{\frac{\ln\frac{1}{2}}{t_{half} }\times x } = M_{0} e^{-0.0217x}$

therefore -0.0217 x = $\ln{0.5} = -0.693$

therefore x = $\frac{-0.693}{-0.0217}$ = 31.942

8 0

3 years ago

When I think of a number, double it, then add 7, I get 25. What number did I think of? ( Hint: Let the number be x)o

vivado [14]

Hey there!

The answer is $9$

We will start by forming an equation to solve this.

So we are starting with a number, $x$ , then doubling it and adding $7$ , which gives us 25.

So:

$2x+7=25$

Now we solve this equation:

$2x+7=25$

$2x=18$

$x=9$

Have a super awesome day!

3 0

3 years ago

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