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Rus_ich [418]
2 years ago
14

It is -12. 5°c outside when the temp starts increasing by 2. 5°c each hour. How long will it take for the temp to reach-5°c

Mathematics
1 answer:
lara31 [8.8K]2 years ago
7 0

Answer:

3 hours

Step-by-step explanation:

12.5/2.5 = 5
then convert it to negative

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simplify the following expression: (x+7/4x) + (5/x-8) I also attached a photo of the problem if you get confused on how I typed
Gnoma [55]

Answer:

\frac{x^{2}  + 19x - 56}{4 {x}^{2}   - 32x}

Step-by-step explanation:

Start by making the denominators of both fraction the same. This can be done by multiplying one fraction's denominator by the other.

After simplifying and combining the two fractions together, check if the numerator can be factorised such that there is a common factor in the denominator and numerator. In this case, the numerator cannot be factorised.

Lastly, expand the denominator.

\frac{x + 7}{4x}  +  \frac{5}{x - 8}

=  \frac{(x + 7)(x - 8)}{4x(x - 8)}  +  \frac{5(4x)}{4x(x - 8)}

=  \frac{x(x) + x( - 8) + 7(x) + 7( - 8) + 20x}{4x(x - 8)}

=  \frac{ {x}^{2} - 8x + 7x - 56 + 20x }{4x(x - 8)}

=  \frac{ {x}^{2}  + 19x - 56}{4x(x - 8)}

=  \frac{ {x}^{2}  + 19x - 56}{4 {x}^{2}  -  32x}

7 0
2 years ago
An airplane flies from City A in a straight line to City B, which is 120 kilometers north and 180 kilometers west of City A. How
Lubov Fominskaja [6]

Answer: 216 kilometers

Step-by-step explanation:

You need the hypotenuse, this is the formula: h = √(a^2 + b^2)    

so...

√(120^2 + 180^2)

√(14400 + 32400)

√46800

216.33

5 0
3 years ago
Write pqqqqrr in exponential form
GalinKa [24]
Pq⁴r²


.......................m
3 0
3 years ago
Which of the following angles is NOT congruent to 6?<br> 3<br> 2<br> 7<br> 1
TiliK225 [7]

Answer:

1

Step-by-step explanation:

We can see that 7 is equal to 6, as opposite angles are the same.

We can also see that 2 is also 6, as corresponding angles are equivalent.

Therefore, 3 is also congruent to 6, as it is equal to 2.

Hope that this helps!

8 0
3 years ago
6 times the difference of d and 5?​
densk [106]

Answer:

6d-30

Step-by-step explanation:

6(d-5)

6d-30             distributive property

4 0
2 years ago
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