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3241004551 [841]
3 years ago
10

Find the area of the composite figure to the nearest hundredth.

Mathematics
1 answer:
Lyrx [107]3 years ago
4 0

Answer:

745.31

Step-by-step explanation:

1.  12.5^2 * 2 = 312.5

2. (3,14 * 156,25)/2 = 245.31

3.  (30 * 12.5)/2 = 187.5

4. 187.5 + 245.31 + 312.5 = 745.31

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The sum of their speeds is 180 miles per hour superman is 20mph faster than Desperado how fast is each roller coaster
madreJ [45]

Superman is 100 mph

Desperado is 80 mph

there total speed is 180 mph and Superman is 20 mph faster

8 0
3 years ago
The sum of 4 times a number and 15 is 47. Find the number.
Bezzdna [24]

Answer:

The number is 8.

Step-by-step explanation:

Write an equation then solve by isolating the variable.

let x be the number

4x + 15 = 47  Subtract 15 from both sides

4x = 47 - 15

4x = 32     Divide both sides by 4

x = 32/4

x = 8

Therefore the number is 8.

7 0
3 years ago
Read 2 more answers
Is 1/7  rational or irrational
KiRa [710]
\frac{1}{7} \ is\ rational\ number. \\\\ Every\ number\ which\ can\ be\ written\ as\ fraction\ (quotient)\ of\ two\\numbers\ is\ rational.
3 0
3 years ago
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-2x-5y-6x+4y<br> A.)-8x-9y<br> B.)-8x-y<br> C.)-8x+y<br> D.)8x+9y
jeyben [28]

Collect like terms

(-2x - 6x) + (-5y + 4y)

Simplify

-8x - y

6 0
3 years ago
Read 2 more answers
I'm asking for help with this please
sergey [27]

Answer:

  • zeros are {-5, -2, 2/3}
  • zeros are {-5/3, 1/4, 5}

Step-by-step explanation:

"17." (the one before 18) Putting x=1 into the equation gives ...

... p(1) = 38+c

We're told this is 18, so we have ...

... 38+c = 18

... c = -20

Now, we know we have polynomial p(x) = 3x³+19x²+16x-20, and we know one root is x=-5. Using synthetic division to divide out the factor (x+5), we have the remaining quadratic factor (3x² +4x -4).

This can be factored by looking for factors of 3×(-4) that sum to 4. Those would be 6 and -2. If we call these "r" and "s", we can write the factored form of the quadratic as ...

... (3x+r)(3x+s)/3 = (3x+6)(3x-2)/3 = (x+2)(3x-2)

We have just factored the quadratic term. The entire p(x) is then factored as ...

... p(x) = 3x³ +19x² +16x -20 = (3x-2)(x+2)(x+5)

The roots are the values of x that make these factors zero:

... {2/3, -2, -5}

18. Using synthetic division to divide the polynomial by (x-5), we find the remainder is 5c+450. In order for that to be zero, the value of c must be -90. Then we have ...

... p(x) = 12x³ -43x² -90x +25

Checking the value of p(-2), we find it is -63, as advertised.

The same synthetic division that told us c=-90 gives the quadratic factor as (12x²+17x-5). This can be factored by looking for factors of 12×(-5) that sum to 17. 20 and -3 are those factors. So, we can write the quadratic as ...

... (12x +20)(12x -3)/12 = (3x +5)(4x -1)

Then the factorization of p(x) is ...

... p(x) = 12x³ -43x² -90x +25 = (3x +5)(4x -1)(x -5)

The roots are the values of x that make these factors zero:

... {-5/3, 1/4, 5}

4 0
3 years ago
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