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Schach [20]
3 years ago
14

Please Help I Will Mark Brainly.

Mathematics
2 answers:
Evgesh-ka [11]3 years ago
8 0

Answer:

13

-1

675

3

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 &lt; -28 or 8 -6b &lt; -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
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