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4 years ago

Simplify: -2x(3 - 5x

Mathematics

2 answers:

xz_007 [3.2K]4 years ago

5 0

Answer:

$- 6x + 10x^{2}$

Step-by-step explanation:

$- 2x(3 - 5x) \\ = - 6x + 10x^{2}$

Evgen [1.6K]4 years ago

4 0

Hope this helps with the answer to your question :)

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(08.02)Which description best describes the solution to the following system of equations?

aksik [14]

I believe it's C. It's the most informative and they intersect at (-3, 9)

4 0

3 years ago

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Explain also please

liraira [26]

J, (8,-3) because since they are diagonals, you can take the x and y values between the vertices and point of intersection.

For x
The distance between 2 and -4 is 6. Moving 6 in the other direction results in an x value of 8 (2+6)

For y
The distance between 5 and 1 is 4. Moving 4 in the other direction gives you a y value of -3 (1-4)

The answer is therefore (8,-3)

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3 years ago

Please answer this correctly

maria [59]

Answer:

The total weight would be 5 lbs 12 oz.

Step-by-step explanation:

First, combine the ounces:

13 + 15 = 28 ounces

Next, convert that into pounds and ounces.

28 oz = 1 lb + 12 oz

Finally, add the weight back to the 4 lb.

1 lb + 4 lb + 12 oz = 5 lb + 12 oz

3 0

4 years ago

Jenny opened a package of screws quickly and many of them spilled on the floor. She needs to organize the fasteners according to

hichkok12 [17]

We have to compare diameters and arrange them in order smallest to greatest

We can see units for option A and B are in square inches so they represents area. So first we will find diameter from area using formula

$A = \pi r^{2}$

so for choice (A) area is given as $4.375 \times 10^{7}$ . So plug this in A place in formula and then solve for radius r

$4.375 \times 10^{7} = \pi r^{2}$

$\frac{4.375 \times 10^{7}}{\pi} = \frac{\pi r^{2}}{\pi}$

$1.393 \times 10^{7} } = r^{2}$

$\sqrt{1.393 \times 10^{7}} = \sqrt{r^{2}}$

3731.76 = r

So screw A will have
$diameter = 2 \times r = 2 \times 3731.76 = 7463.52$ inches

Similarly for choice (E) area is $1.428 \times 10^{1} = 14.28$
so again plug in formula

$A = \pi r^{2}$

$14.28 = \pi r^{2}$

$\frac{14.28}{\pi} = \frac{\pi r^{2}}{\pi}$

$4.5477 = r^{2}$

$\sqrt{4.5477} = \sqrt{r^{2}}$

2.13201 = r

So screw E will have
$diameter = 2 \times r = 2 \times 2.13201 = 4.26402$ inches

So diameters of all screws are as follows:

Screw A: 7463.52 inches
Screw B: 1.5 inches
Screw C: $1\frac{7}{8} = \frac{1\times 8+7}{8} = \frac{15}{8} = 1.875$ inches
Screw D: 0.25 inches
Screw E: 4.26402 inches

Comparing all numbers 7463.52, 1.5, 1.875, 0.25, 4.26402 we can see that smallest number is 0.25, then comes 1.5, then 1.875 and then 4.26402 and then 7463.52

So order from least to greatest will be screw D (0.25), B(1.5), C(1.875), E (4.26402), A (7463.52).

So thats the order D,B,C,E,A and the final answer

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4 years ago

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5 x 1 please?? im teaching my cousin right now

Pachacha [2.7K]

Tell your cousin good luck and that the answer is 5 :)

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3 years ago

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