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torisob [31]
3 years ago
11

Find the value of expression - 17x-19xpwer4 - 21x power 2,when x=3​

Mathematics
1 answer:
Marrrta [24]3 years ago
7 0

Answer:

-17x - 19x^4 - 21x^2 = -1779 when x = 3

Step-by-step explanation:

Given

-17x - 19x^4 - 21x^2

x = 3

Required

Solve

Substitute 3 for x in -17x - 19x^4 - 21x^2

-17x - 19x^4 - 21x^2 = -17*3 - 19*3^4 - 21*3^2

Evaluate all exponents

-17x - 19x^4 - 21x^2 = -17*3 - 19*81 - 21*9

-17x - 19x^4 - 21x^2 = -51 - 1539- 189

-17x - 19x^4 - 21x^2 = -1779

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3 years ago
Three girls download a total of 36 songs on their iPods. Jane downloaded twice as many as Inez and since Tracy wanted to have th
lesya692 [45]
J + i + t = 36
j = 2i
t = j + 1.....t = 2i + 1

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j = 2i = 2(7) = 14 <==Jane downloaded 14 songs
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3 years ago
A quadrilateral with 90 degree angles is shown. The lengths of the left and right sides are 10 and 2 y + 4. The lengths of the t
notka56 [123]

Answer: y=3

Step-by-step explanation:

Since the quadrilateral has 90 degree angles, it must be a a square or a rectangle. This means the measure of sides left and right are the same and the measure of sides top and bottom are the same.

To get the measure of y, you can use left and right or top nd bottom.

I'll use left and right. 10=2y+4 => 10-4=2y => 6=2y => y=3

You can check it by substituting. 2(3)+4=10      The answer is the measure of the right side, which is the same as the measure of the left side.

I hope this helps you!

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Answer:

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woman works out by running and swimming. When she runs, she burns 7 calories per minute. When she swims, she burns 8 calories pe
RSB [31]
An inequality to model this would be

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