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3 years ago

Please Help I Will Mark Brainly.

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

8 0

Answer:

-1

675

Step-by-step explanation:

bija089 [108]3 years ago

6 0

Answer:

1. 5,9,13

2. 5,2,-1

3. 150,325,500,675

4. -9,-5,-1,3

Step-by-step explanation:

1. 5,9 5+4=9 or 9-5+4

2. 5,2 5-2=3 or 2+3=5

3. 150,325,500 325+175=500 or 500-325=175

4. -9,-5,-1 -9+4=-5 or -9 - -5= 4

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PLEASE HELP MEEEEE!! WILL MARK BRAINLIST!!

Lynna [10]

I believe the answer is D, I’m almost 100% positive this is correct

6 0

3 years ago

We take a milk carton from the refrigerator and put it on the table at room temperature. We assume that the temperature of the c

Kisachek [45]

We can solve this problem using separation of variables.

Then apply the initial conditions

EXPLANATION

We were given the first order differential equation

$\frac{dT}{dt}=k(T-a)$

We now separate the time and the temperature variables as follows,

$\frac{dT}{T-a}=kdt$

Integrating both sides of the differential equation, we obtain;

$ln(T-a)=kt +c$

This natural logarithmic equation can be rewritten as;

$T-a=e^{kt +c}$

Applying the laws of exponents, we obtain,

$T-a=e^{kt}\times e^{c}$

$T-a=e^{c}e^{kt}$

We were given the initial conditions,

$T(0)=4$

Let us apply this condition to obtain;

$4-20=e^{c}e^{k(0)}$

$-16=e^{c}$

Now our equation, becomes

$T-a=-16e^{kt}$

or

$T=a-16e^{kt}$

When we substitute a=20,
we obtain,

$T=20-16e^{kt}$

b) We were also given that,

$T(5)=8$

Let us apply this condition again to find k.

$8=20-16e^{5k}$

This implied

$-12=-16e^{5k}$

$\frac{-12}{-16}=e^{5k}$

$\frac{3}{4}=e^{5k}$

We take logarithm to base e of both sides,

$ln(\frac{3}{4})=5k$

This implies that,

$\frac{ln(\frac{3}{4})}{5}=k$

$k=-0.2877$

After 15 minutes, the temperature will be,

$T=20-16e^{-0.2877\times 15}$

$T=20-0.21376$

$T=19.786$

After 15 minutes, the temperature is approximately 20°C

6 0

3 years ago

What is the product of the two binomials below?

Rufina [12.5K]

Answer:

A. 9A² - 16B²

Step-by-step explanation:

(3A + 4B)(3A - 4B)

Distribute:

3A(3A - 4B)

4B(3A - 4B)

Multiply:

3A(3A - 4B)

3A(3A) + 3A(-4B)

9A² - 12AB

4B(3A - 4B)

4B(3A) + 4B(-4B)

12AB - 16B²

Combine like terms:

9A² - 12AB + 12AB - 16B² <== -12AB + 12AB cancels out

9A² - 16B²

Therefore, our final answer is 9A² - 16B²

Hope this helps!

7 0

2 years ago

What are the answers to 7.8x3.75, 8.2x2.5, 10.9x3.4, 9.25x1.5, 9.6x5.75 please multiply these.

Zielflug [23.3K]

29.25, 20.5, 37.06, 13.875, 55.2

5 0

3 years ago

HelpPPPPP can y'all help solve this? 10b -8 < -28 or 8 -6b < -4

artcher [175]

Answer:

b < 2

Step-by-step explanation:

10b - 8 < 28

Add 8 to both sides

10b -8 + 8< -28 + 8

Simplify

10b < 20

divide both sides by ten

10b divided by 10 < -20 divided by ten

b < 2

3 0

3 years ago