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Rashid [163]
3 years ago
12

Which expression is equal to 5(2x^2-1)+3(7x^2+1)

Mathematics
1 answer:
vitfil [10]3 years ago
4 0

Answer:

31x² - 2

Step-by-step explanation:

5(2x²-1)+3(7x²+1) = 5*2x² - 5*1 + 3*7x² + 3 = 10x² - 5 + 21x² + 3 = 31x² - 2

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How many sides does a polygon have if the sum of the measure will of the interior is 10260
Klio2033 [76]

The polygon have 59 sides.

Solution:

Sum of the measure of interior angle of the polygon = 10260°

Interior angle theorem of polygon,

<em>The sum of measure of interior angles of a polygon is (n – 2) × 180°.</em>

By this theorem,

(n – 2) × 180° = 10260°

Divide by 180° on both sides.

$\frac{(n - 2) \times 180^\circ}{180^\circ}  = \frac{10260^\circ}{180^\circ}

n-2=57

Add 2 on both sides, we get

n – 2 + 2 = 57 + 2

n = 59

Hence the polygon have 59 sides.

5 0
3 years ago
Can anyone help? I’ll give Brainly, it’s not 5.5 x 60,000 :(
zhenek [66]

Answer:

2850

Step-by-step explanation:

You pay 3% on the first 10,000, 5% on the next 40,000, and 5.5% on the last 10,000.

10,000x.03=300

40,000x0.05=2000

10,000x.055=550

2000+550+300=2,850

4 0
3 years ago
Solving equations -3x + 7 = 28​
ss7ja [257]

Answer:

x = - 7

Step-by-step explanation:

Given

- 3x + 7 = 28 ( subtract 7 from both sides )

- 3x = 21 ( divide both sides by - 3 )

x = - 7

3 0
3 years ago
Read 2 more answers
1 fourth of 16 in a numerical expression
Nikitich [7]
The answer should be 4 16/4 = 4
7 0
3 years ago
7/8 divided by 1/16 in simplest form?
natulia [17]

Answer:

14

Step-by-step explanation:

Keep, change, flip!

7/8 / 1/16

7/8 x 1/16

7/8 x 16/1

Equals...

112/8

Which can be simplified to...

14!

Hope this helped!

5 0
3 years ago
Read 2 more answers
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