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3 years ago

(-5ab+4a+4) - (2ab-1)

Mathematics

2 answers:

kaheart [24]3 years ago

7 0

Answer:

−7ab+4a+5

Step-by-step explanation:

−5ab+4a+4−2ab+1

(−5ab−2ab)+4a+(4+1)

−7ab+4a+5

kaheart [24]3 years ago

4 0

Answer:

-7ab+4a+3

Just [add/subtract] all like terms.

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tekilochka [14]

Answer:

x = $\sqrt{164$

Step-by-step explanation:

In order to find the hypothenuse, you need to do $8^{2} + 10^{2}$ . Which equals 164. Therefore, since $a^{2} +b^{2} =c^{2}$ , a=8, b=10, and c= $\sqrt{164$ .

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3 years ago

A car traveling east at 40.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in

Anni [7]

Step-by-step explanation:

It is given that,

Initial speed of the car, u = 40 m/s

Final speed of the car, v = 25 m/s

Time taken, t = 3.5 s

(a) We need to find the magnitude and direction of the car’s acceleration as it slows down. It can be calculated using formula as :

$a=\dfrac{v-u}{t}$

$a=\dfrac{25-40}{3.5}$

$a=-4.28\ m/s^2$

The acceleration is in the opposite direction of motion i.e. west.

(b) Let s is the distance the car travel in the 3.5-s time period. It can be calculated using the third equation of motion as

$s=\dfrac{v^2-u^2}{2a}$

$s=\dfrac{25^2-40^2}{2\times (-4.28)}$

s = 113.9 meters

Hence, this is the required solution.

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3 years ago

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Marat540 [252]

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3 years ago

The mass of a proton is approximately 1.67 x 10−24, and the mass of an electron is approximately 9.11 x 10−28. Find the approxim

nataly862011 [7]

Answer:

≈ 1833

Step-by-step explanation:

To find ratio of proton mass to electron mass, we have to divide.

The numbers are given in <em>scientific notation</em>.

Let a number be $a*10^b$ and another be $c*10^d$ , when we divide, we will follow the rule shown below:

$\frac{a*10^b}{c*10^d}=(\frac{a}{c}*10^{b-d})$

Now, we use the information given to find the ratio:

$\frac{1.67*10^{-24}}{9.11*10^{-28}}\\=(\frac{1.67}{9.11}*10^{-24--28})\\=0.1833*10^4$

This means we can find the number by taking 4 decimal places to the right, so that would becomes:

$0.1833*10^4=1833$

The approximate ratio is 1833 [mass of proton is around 1833 times heavier than mass of electron]

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3 years ago

Read 2 more answers

What are the multiples of rotation for a rectangle

Sedbober [7]

Answer:

Rotation of 90° (CounterClockwise) (x, y) (-y, x)

Rotation of 180° (Both Clockwise and Counterclockwise) (x, y) (-x, -y)

Rotation of 270° (Clockwise) (x, y) (-y, x)

Rotation of 270° (CounterClockwise)

Step-by-step explanation:

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3 years ago