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GarryVolchara [31]

3 years ago

13

Write 3 x 10'in standard notation.

2 answers:

9966 [12]3 years ago

4 0

3 x 10^1 in standard notation is equal to 30

MArishka [77]3 years ago

3 0

Answer:

30x

Step-by-step explanation:

Multiply 10 by 3

.

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Solve −2x2 +3x − 9 = 0

luda_lava [24]

-2x^2 + 3x - 9 = 0
The quadratic is not factorable so quadratic formula must be used.
x = (-b + - √(b^2 - 4ac))/2a
a = -2, b = 3, c = -9
x = (-3 + - √(9 - 4*-2*-9))/-4
x = (-3 + - √(-63))/-4
x = -3 + - 3i√7
   --------------
   -4
x = 3 + 3i√7 x = 3 - 3i√7
    ------------ ------------
   4 4

8 0

3 years ago

Karl uses 8 whole square tiles and 8 half square tiles to make a mosaic. What is the area of his mosaic?

trapecia [35]

Answer:

48

Step-by-step explanation:

8 squares=32

8 half squares=16

32+16=48

There are 4 sides to a 8 whole squares 8*4=32

There a 2 sides to 8 half squares 8*2=16

8 0

2 years ago

After selling a dozen copies of the daily

Y_Kistochka [10]

I think the newsstand has 87 papers in the beginning of the day

7 0

3 years ago

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A large aquarium contains only two kinds of fish, guppies and swordtails. If 3/4 of the number of guppies is equal to 2/3 of

Jlenok [28]

Answer:

$\frac{8}{17}$ of fish in this aquarium are guppies.

Step-by-step explanation:

Let x be the number of guppies and y be the number of swordtails in the aquarium,

According to the question,

$\frac{3}{4}\text{ of } x=\frac{2}{3}\text{ of }y$

$\frac{3x}{4}=\frac{2y}{3}$

By cross multiplication,

$9x=8y$

$\implies \frac{x}{y}=\frac{8}{9}$

Thus, the ratio of guppies and swordtail fishes is 8 : 9

Let guppies = 8x, swordtail = 9x

Where, x is any number,

Since, the aquarium contains only two kinds of fish, guppies and swordtails,

So, the total fishes = 8x + 9x = 17x

Hence, the fraction of fish in the aquarium are guppies = $\frac{\text{Guppies}}{\text{Total fishes}}$

$=\frac{8x}{17x}$

$=\frac{8}{17}$

6 0

3 years ago

Simplify the expression below:<br><br> 2(4x + 5y)

Alexxx [7]

Answer:

8x + 10y

Hope this helps!

8 0

3 years ago

Read 2 more answers