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OleMash [197]
3 years ago
5

2a + 5a x 4a - a simplify

Mathematics
1 answer:
gtnhenbr [62]3 years ago
8 0

Answer:

20a² + a

= a(20a + 1)

Step-by-step explanation:

2a + 5a × 4a - a

= 2a + 20a² - a

= 20a² + a

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20% more than 80 is ?
Diano4ka-milaya [45]

20% more than 80:

80 + 20% of 80

80 + 20/100 × 80

80 + 16

= 96

7 0
3 years ago
Determine the value of x.<br> x feet<br> 14 feet<br> 48 feet
Citrus2011 [14]

Answer:50 feet

142+482=502

196+2304=2500

Step-by-step explanation:

6 0
2 years ago
I need to find the area of the shaded region
spin [16.1K]
Well first find the area of the semi-circle. 

If the area of a cricle is equal to pi*radius^2 , then you can just find that and divide by 2.

So, A = pi*2^2. = 4pi

We know that the radius is 2 because the length of the side of the rectangle is 4, meaning that the diameter of the semi-circle is 4, and so the radius is 2 as it is half of the diameter. 

We can easily calculate the area of the rectangle, which is
 Length * width = 6*4 = 24.

Next we divide 4pi by 2 in order to get the area of the semi-circle, giving us an area of 2pi

We can just subtract 2pi from 24 and get the area of the shaded region.

Area of the shaded region (answer): 17.7
4 0
3 years ago
Hi! I need help on #12 A, and B! Just kinda confused so if u could explain in a simple way that’d be great!
Vinvika [58]

Assume that the bank balance started at zero. Enter the income and outgo in chronological order: $300 - $50 - $75 + $225

Find the sum. This sum will represent the amount left in the account after the $225 deposit:

$250 - $75 + $225, or

$175 + $225 = $400 The final balance will be $400.

5 0
3 years ago
Read 2 more answers
Complete the equation: x2 + 10x +__= (__)^2
Sliva [168]

Answer:

x2 + 10x +25 = (x+5)^2

Step-by-step explanation:

x^2 + 10x

To complete the square

Take the coefficient of x

10

Divide by 2

10/2 =5

Square it

5^2 =25

Add it

x2 + 10x +25

The coefficient of x divided by 2 is the factor we add to x inside the square

(x+5)^2

6 0
3 years ago
Read 2 more answers
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