In a science experiment, the temperature of a substance is changed from 42 degrees to -54 degrees at an average rate of -12 degrees per hour. Over how many hours does the change take place?

Answer:

2 3/8

Step-by-step explanation:

Answer:

Assuming you meant 19/8, the answer would be 2 and 3/8

Step-by-step explanation:

How many times does 8 go into 19? Twice, plus you will have 3 leftover since 8 x 2 is only 16 and not 19. That 2 stays a 2 and the left over 3 is 3/8, so your answer is 2 + 3/8

Answer:

x = -3 or +3

Step-by-step explanation:

x²/3 = 3

x² = 9

-> x = -3 or +3

Answer:

a) t=98

b) b=32

Step-by-step explanation:

a)  4t/7  -20=36r

     r=1

     4t/7-20=36

     [tex]\frac{4t-140}{7}[/tex]=36

     4t-140=252

     4y=392

      t=98

b) 2k/5=b/2-12

k=10

20/5=b/2-12

4=[tex]\frac{b-24}{2}[/tex]

8=b-24

b=32

Answer:

According to the inequality, how much money did Merlin make last  month more than? -> 350 dollars

Can Merlin achieve his goal by selling 6 black beards and 8 red

beards? explain why.

Yes, black beard sum will total up to $120 and red beard sum will total up to $200, $120+$200 = $320

$320 < $350

Step-by-step explanation:

plz mark as brainliest!

Answer: Lol its A

Step-by-step explanation:

Answer:

It's the first one.

Answer:

x=3/2 or in decimal form it is x=1.5

Step-by-step explanation:

Answer:

X=1/4 (or 0.25)

Step-by-step explanation:

6x-2=12-10x-10

6x-2=2-10x

6x+10x=2+2

16x=4

x=4/16

x=1/4

Answer:

Step-by-step explanation:

If two parallel lines are cut by a transversal then alternate exterior angles are equal.

Therefore:

3x - 8 = x + 88

+8-x        +8-x

   2x = 96

    ÷2    ÷2

      x = 48

Answer:

red

Step-by-step explanation:

big red

Step-by-step explanation:

Square root of 25 can be +5 or -5

Square root of 16 can be +4 or -4.

As -5 can be square root of 25 and +4 can be a root of 16 , -5 < +4 . That's why square root of 25 could be less than square root of 16.

Answer:

14.7

Step-by-step explanation:

Answer:

https://brainly.com/question/19844359?answeringSource=feedPublic%2FhomePage%2F1

Step-by-step explanation:

here's a link to the answers

Answer:    

(-4,-7)

(4,7)

(-4,-5)

(1,-1)

Step-by-step explanation:

Answer: (-4,-7) (4,7) (-4,-5) (1,-1)

Step-by-step explanation:

Answer:

I believe its the third one, its makes a symmetrical line so that's my guess

Step-by-step explanation:

The rest don't make a line

Step-by-step explanation:

The answer for length of BC is 4.0 feet.

Answer: 2

Step-by-step explanation:

Answer:

-2.4f - 21

Step-by-step explanation:

In this question, we have to simplify the expression.

Solve:

-2.6f + 0.2f - 16 - 5​

Combine like terms.

-2.6f + 0.2f - 16 - 5​

-2.4f - 16 - 5​

-2.4f - 21

Since we can't simplify further, -2.4f - 21 would be your answer.

Answer:

(a) The area of the triangle is approximately 39.0223 cm²

(b) ∠SQR is approximately 55.582°

Step-by-step explanation:

(a) By sin rule, we have;

SQ/(sin(∠SPQ)) = PQ/(sin(∠PSQ)), which gives;

5.4/(sin(52°)) = 6.8/(sin(∠PSQ))

∴ (sin(∠PSQ)) = (6.8/5.4) × (sin(52°)) ≈ 0.9923

∠PSQ = sin⁻¹(0.9923) ≈ 82.88976°

Similarly, we have;

5.4/(sin(52°)) = SP/(sin(180 - 52 - 82.88976))

Where, 180 - 52 - 82.88976 = ∠PQS = 45.11024

SP = 5.4/(sin(52°))×(sin(180 - 52 - 82.88976)) ≈ 4.8549

Given that RS : SP = 2 : 1, we have;

RS = 2 × SP = 2 × 4.8549 ≈ 9.7098

We have by cosine rule, [tex]\overline {RQ}[/tex]² =  [tex]\overline {SQ}[/tex]² +  [tex]\overline {SR}[/tex]² - 2 × [tex]\overline {SQ}[/tex] × [tex]\overline {SR}[/tex] × cos(∠QSR)

∠QSR and ∠PSQ are supplementary angles, therefore;

∠QSR = 180° - ∠PSQ = 180° - 82.88976° = 97.11024°

∠QSR = 97.11024°

Therefore;

[tex]\overline {RQ}[/tex]² =  5.4² +  9.7098² - 2 ×  5.4×9.7098× cos(97.11024)

[tex]\overline {RQ}[/tex]² ≈ 136.42

[tex]\overline {RQ}[/tex] = √(136.42) ≈ 11.6799

The area of the triangle = 1/2 ×[tex]\overline {PQ}[/tex] × [tex]\overline {PR}[/tex] × sin(∠SPQ)

By substituting the values, we have;

1/2 ×[tex]\overline {PQ}[/tex] × [tex]\overline {PR}[/tex] × sin(∠SPQ)

1/2 × 6.8 × (4.8549 + 9.7098) × sin(52°) ≈ 39.0223 cm²

The area of the triangle ≈ 39.0223 cm²

(b) By sin rule, we have;

[tex]\overline {RS}[/tex]/(sin(∠SQR)) = [tex]\overline {RQ}[/tex]/(sin(∠QSR))

By substituting, we have;

9.7098/(sin(∠SQR)) = 11.6799/(sin(97.11024))

sin(∠SQR) = 9.7098/(11.6799/(sin(97.11024))) ≈ 0.82493

∠SQR = sin⁻¹(0.82493) ≈ 55.582°.

Answer:

.54

Step-by-step explanation:

Answer:

X=-2

Step-by-step explanation:

Hope it helps

Answer:

5 seconds?

Step-by-step explanation:

Ariel y = x + 10

Tori y = 3x

(5,15)

Answer: $1.61

Step-by-step explanation:

$35.70 - $3.50 = $32.2

$32.2 ÷ 20 = $1.61

Answer:

1.61

Step-by-step explanation:

35.70 - 3.50 = 32.2

32.2 divided by 20

= 1.16

Answer:its #

Step-by-step explanation:

its #

Answer:

both add up to 90 degrees, which is a complementary angle, separately, each is 45 degrees

Step-by-step explanation:

Answer:

Option D

Step-by-step explanation:

SAS criterion- two sides and an included angle.

This means that we have

(i) AC = DE

(ii) ∠C = ∠D

(iii) the third should be another side so that there are 2 sides with an included angle.

Hence, it will be

BC = FE                     (Option D)

Hope this helps you!

Answer:

(D). 1

Step-by-step explanation:

-17(x - 2) = 16 + x

-17 × x - (-17) × (2) = 16 + x

-17x + 34 = 16 + x

-17x - x = 16 - 34

-18x = - 18

18x = 18

x = 18/18

x = 1

Thus, The value of x is 1

-TheUnknownScientist

Answer:

5,790 K

Step-by-step explanation:

Hope this helps. :)

Answer:

-3v + 24

Step-by-step explanation:

-3(v - 8)

-3v + 24

you cannot simplify this expression any further

Answer:

44 hundreds.

Step-by-step explanation:

4400/100 = 44 :)

Answer:

v = [tex]-\frac{32}{3}[/tex]

Step-by-step explanation:

7v = 4v - 32

7v - 4v = -32

3v = -32

v = [tex]-\frac{32}{3}[/tex]

Answer:

10.68

Step-by-step explanation:

7v=4v-32

-4v  -4v

----------------

3v=-32

v=10.67

So then you'd plug that into the thing:

7(10.67)=4(10.67)-32

74.69=42.68-32

10.68