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3 years ago

Help please anyone?!‼️

Mathematics

2 answers:

hodyreva [135]3 years ago

7 0

Answer:

-20.1 degrees Celsius

Step-by-step explanation:

The system started at -12.6 Celsius. It then cooled 7.5 degrees during a reaction. Because it cooled, that means the difference is negative.

-12.6 degrees Celsius - 7.5 degrees Celsius = -20.1 degrees Celsius

It is important to always remember your correct names and variables for numbers in chemistry!

Brilliant_brown [7]3 years ago

4 0

Answer: -20.1 hope this helped

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Slove this for me please

Alborosie

Answer:

-10

Step-by-step explanation:

divide both sides by -4

simplify to v+8=-2

subtract 8 from both sides

v=-10

6 0

2 years ago

Elias was given a lock for his school locker. The lock contains numbers between

daser333 [38]

Answer:

34,220

Step-by-step explanation:

Because order doesn't matter, but the numbers can't be repeated, we need to find the number of combinations where 3 individual numbers can be chosen out of 60 possible numbers using the binomial coefficient:

$\binom{n}{k}=\frac{n!}{k!(n-k)!}\\ \\\binom{60}{3}=\frac{60!}{3!(60-3)!}\\\\\binom{60}{3}=\frac{60!}{3!(57)!}\\\\\binom{60}{3}=\frac{60*59*58}{3*2*1}\\ \\\binom{60}{3}=34220$

Thus, Elias can make 34,220 unique 3-number codes given 60 different numbers.

6 0

2 years ago

How do you solve these type of problems ?

-Dominant- [34]

Answer:

x = 15

Step-by-step explanation:

This involves the Secant and Segments Theorem.

8(19 + 8) = 9(9 + x)

216 = 81 + 9x

9x = 135

x = 15

8 0

2 years ago

If Mike loses $5 per week, how much does he lose in 4 weeks?

MrMuchimi

Answer:

Step-by-step explanation:

$1week \: = 5 \\ 4 \: weeks = x \\ \\ x = 20$

hope this helps you.

Can I have the brainliest please?

Have a nice day!

7 0

3 years ago

SHOPPING Sergio, Boris, and Opa went shopping. If you add 4 dollars to the amount of money Sergio spent

Georgia [21]

Answer:

answer is 2

Step-by-step explanation:

if you create an equation: (s+4)x2 = boris s-1x12 = opa

only one that only works out is 2

6 0

3 years ago