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3 years ago

Can you explain this for me 7-9÷3+6×6×2-4÷2

Mathematics

1 answer:

baherus [9]3 years ago

8 0

Answer:

The Answer Is 74. Your Welcome

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Point Q is on line segment PR. Given QR = 3x, PQ = x + 6, and

nadya68 [22]

Given:

Point Q is on line segment PR.

QR = 3x, PQ = x + 6, and PR = 5x – 4.

To find:

The numerical length of PQ.

Solution:

Since, point Q is on line segment PR, so by segment addition property, we get

$PR=PQ+QR$

$5x-4=(x+6)+3x$

$5x-4=4x+6$

$5x-4x=4+6$

$x=10$

The value of x is 10.

Now,

$PQ=x+6$

Putting x=10, we get

$PQ=10+6$

$PQ=16$

Therefore, the numerical length of PQ is 16 units.

7 0

3 years ago

Need to find the number for a

Shalnov [3]

Answer to the first triangle: 15

To solve this we will use the Pythagorean theorem

Pythagorean theorem formula: $a^{2} + b^{2} =c^{2}$

Lets do the first triangle.

17 is the hypotenuse, so its going to replace c in the formula.

8 is the height and it is going to replace a in the formula.

a is what we are trying to find, so our b in the equation is going to be the unknown.

$8^2 + b^2 = 17^2$

$64 + b^2 = 289

$

$b^2 = 289 - 64$

$b^2 = 225$

$\sqrt{b^2} = \sqrt{225}$

$b = 15$

now we know that the missing length in the first triangle (a) is 15

Can you solve the Other one?

Just comment if you need help on the other one.

4 0

4 years ago

Don't spam...<br><br>Step by step explaination needed...

Anastasy [175]

Answer:

$\:$

Step-by-step explanation:

Given polynomial :

f(x) = 2x³–5x² + 5x

Let the number to be subtracted be n

(x is already in equation so, n is better)

since, 2x – 3 factor given

→

$f ( \frac{3}{2} ) = 0$

So,

$2x {}^{3} - 5x {}^{2} + 5 {x}^{2} - n$

$2x {}^{3} - 5x {}^{2} + 5x - n = 0 \\ \\ 2( \frac{3}{2} ) {}^{3} - 5( \frac{3}{2} ) {}^{2} + 5( \frac{3}{2} ) - n = 0 \\ \\ 2 \times \frac{27}{8} - 5 \times \frac{9}{4} + 5 \times \frac{3}{2} - n \: = 0 \\ \\ \frac{27}{4} - \frac{45}{4} + \frac{15}{2} - \frac{n}{1} = 0 \\ \\ 27 - 45 + 30 - 4n = 0 \\ \\ 12 - 4n \: = 0 \\ \\n = \frac{ - 12}{ - 4} \\ \\ n = > 3$