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3 years ago

Does anyone know “?” ? ILL MARK AS BRAINLIEST

Mathematics

1 answer:

bearhunter [10]3 years ago

5 0

Answer:

sorry for the late...its done have a look

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Thank you for helping me

Delicious77 [7]

Answer:

$x = 2$

Step-by-step explanation:

$18 = 6(5 - x) \\ 18 = 30 - 6x \\ 6x - 30 = - 18 \\ 6x = 30 - 18 \\ 6x = 12 \\ \\ x = \frac{12}{6} \\ \\ x = 2$

5 0

3 years ago

Read 2 more answers

PLS HELP ASAP I WILL GIVE BRANERLIST PLUS 15 POINTS THE CHOSE ONES ARE WARMER AND COLDER BTWWWW

nikdorinn [45]

Answer:

colder and warmer

Step-by-step explanation:

-13 is colder and -9 is warmer than -12

4 0

3 years ago

Read 2 more answers

Can someone help and please make sure the answer is right :)

il63 [147K]

Answer: x =9

Step-by-step explanation:

These are corresponding angles, meaning they are equal. (the same angle). Set them equal to each other to solve. 13x+ 3 = 12x +12. Subtract 3 from both sides. 13x = 12x + 9. Subtract 12x from both sides. X = 9

3 0

3 years ago

A square pyramid has a volume of 20 cubic feet and a base length of 5 feet. What is it's height?

erastova [34]

Answer:

The height of the pyramid is $2.4\ ft$

Step-by-step explanation:

we know that

The volume of a square pyramid is equal to

$V=\frac{1}{3}b^{2}h$

we have

$V=20\ ft^{3}$

$b=5\ ft$

substitute and solve for h

$20=\frac{1}{3}(5)^{2}h$

$60=(25)h$

$h=60/(25)=2.4\ ft$

5 0

3 years ago

The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min

denis23 [38]

Answer:

(b) 67

Step-by-step explanation:

A solution to the differential equation describing the temperature according to Newton's Law of Cooling could be written as ...

T = (final temp) + (initial difference)×(decay factor)^t

where the decay factor is the fraction of change during 1 unit of time period t.

Here, the initial difference of 100-25 = 75 degrees decays to 90-25 = 65 degrees in 1 minute. So, the units of t are minutes, the decay factor is 65/75, the initial difference is 75 degrees, and the final temperature is 25 degrees. That lets us write the equation as ...

T = 25 +75(65/75)^t

Then for t=4, the temperature is ...

T = 25 +75(13/15)^4 ≈ 67.3 . . . . degrees

After 4 minutes the temperature of the coffee is about 67 degrees.

4 0

2 years ago