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3 years ago

the nth term of a sequence is fine by the expression 5-3n write down the first two terms of this sequence

Mathematics

1 answer:

Len [333]3 years ago

5 0

$a_1=5-3\cdot1=5-3=2\\
a_2=5-3\cdot2=5-6=-1\\$

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Solve for x. −1.5x = −2.55 A) −1.5 B) 1.5 C) 1.7 D) 1.9

Liono4ka [1.6K]

Answer:

Step-by-step explanation:

-1.5x=-2.55

1.5x=2.55

x=2.55/1.5

x=1.7

8 0

3 years ago

Find the area and perimeter of an isosceles trapezoid with legs 25cm and bases 16cm and 30cm

Varvara68 [4.7K]

A=1/2h(b1+b2)
= 1/2(h)(30+16)
>how to find h<
>30-16= 14/2 = 7<
>25²-7² = 625-49 = 576<
>√576 = 24 .. h=24<
= 1/2(24)(30+16)
= 12(46)
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= 30+16+25+25
P = 96 cm

4 0

3 years ago

Read 2 more answers

Solve y′′=sin(x) if y(0)=0 and y′(0)=5. y(x)=?

Ksenya-84 [330]

Answer:

$y(x)=6x-sin(x)$

Step-by-step explanation:

Rewrite the differential equation as:

$\frac{d^{2} y }{dx^{2} } =sin(x)$

Integrate both sides with respect to x:

$\int\ \frac{d^{2} y }{dx^{2} } dx = \int\ sin(x) dx$

$\frac{dy}{dx} =-cos(x)+C_1$

Integrate one more time both sides with respect to x:

$\int\ \frac{dy}{dx} = \int\ -cos(x)+C_1 dx$

$y(x)=-sin(x)+C_1x+C_2$

Now that we find the solution, let's find its derivate:

$y'(x)=C_1-cos(x)$

Evaluating the initial conditions:

$y(0)=C_1(0)+C_2-sin(0)=0\\C_2=0$

$y'(0)=C_1-cos(0)=5\\C_1=5+1=6$

Replacing the value of the constants that we found in the differential equation solution:

$y(x)=6x-sin(x)$

6 0

3 years ago

What equation can be written from this sequence? -50, -33, -16, 1

Kaylis [27]

-50 + 17 = - 33
-33 + 17 = -16
- 16 +17 =1

This is arithmetic sequence, where 1st term is -50,
and common difference is 17.
Formula for the term of arithmetic sequence
a(n) = a(1) +d(n-1) = -50 +17(n-1) = -50 +17n - 17 = -67 +17n

So, we can write a formula
a(n) = -67 +17n

7 0

3 years ago

Please Help ASAP Due in 1 hour!!! Marking Brainliest!!!

kobusy [5.1K]

Answer:

B) F = RN/(1 - R)

Step-by-step explanation:

R = F/(N + F)
R (N+F) = F
RN + RF = F
F - RF = RN
F(1 - R) = RN
F = RN/(1 - R)

Correct option is B)

8 0

3 years ago