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krek1111 [17]
3 years ago
9

What is the sum of the geometric sequence -4,24,-144, ... if there are 7 terms?

Mathematics
1 answer:
const2013 [10]3 years ago
4 0
S_7=-4+24-144+864-5184+31104-186624
S_7=-4(1-6+36-216+1296-7776+46656)
(-6)S_7=-4(-6+36-216+1296-7776+46656-279936)
S_7-(-6)S_7=-4(1+279936)
S_7=-\dfrac47\times279937=-159964
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Find each missing angle of the trapezoid
zimovet [89]

Answer:

∠J = 107°

∠K =107°

∠L = 73°

∠M = 73°

Step-by-step explanation:

Angle J + angle M = 180°

(10x - 33) + (4x+17) = 180

simplify:

14x -16 = 180

14x = 196

x = 14

∠J = 10(14) - 33 = 107°

∠M = 4(14) + 17 = 73°

7 0
3 years ago
Which of the following is equivalent to 1/3(6x-12y) ?
harkovskaia [24]
1/3(6x-12y)
2x - 4y

the answer is A
5 0
3 years ago
Pls help soon:)
Tanzania [10]
Correct answers are:
(1) <span>28, 141 known cases
(2) 79913.71 known cases after six weeks (round off according to the options given)
(3) After approx. 9 weeks (9.0142 in decimal)

Explanations:
(1) Put x = 0 in given equation
</span><span>y= 28, 141 (1.19)^x
</span><span>y= 28, 141 (1.19)^(0)
</span>y= 28, 141


(2) Put x = 6 in the given equation:
<span>y= 28, 141 (1.19)^x
</span><span>y= 28, 141 (1.19)^(6)
</span>y= 79913.71

(3) Since
y= 28, 141 (1.19)^x
And y = <span>135,000

</span>135,000 = 28, 141 (1.19)^x
135,000/28, 141 = (1.19)^x

taking "ln" on both sides:
ln(4.797) = ln(1.19)^x

ln(4.797) = xln(1.19)
x = 9.0142 (in weeks)

5 0
3 years ago
In the expression 2a + 5 + a -14 + 3b which ones are the constants​
Finger [1]

Answer:

5

Step-by-step explanation:

Constant= # without variable

5 0
3 years ago
Read 2 more answers
What are the values a, b, and c in the following quadratic equation?<br><br> −6x = −8x2 − 13
lesya692 [45]

Answer:

Quadratic equation follows form: ax^2 + bx + c = 0

a = 8

b = - 6

c = 13

4 0
3 years ago
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