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Oksana_A [137]
3 years ago
11

Expand and simplify (x+2)(x-5)

Mathematics
1 answer:
umka21 [38]3 years ago
4 0

Answer:

{x}^{2}   - 3x  - 10

Step-by-step explanation:

multiply first x by second x

multiply first x by -5

Multiply 2 by second x

multiply 2 by -5

(x×x)+(x×-5)+(2×x)+(2×-5)

this is equal to

{x}^{2}   - 3x  - 10

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Find the angle between the given vectors to the nearest degree.
konstantin123 [22]

Answer:

c. 108.4

Step-by-step explanation:

cos theta = (u dot v)/ (||u||  ||v||)

where dot stands for dot product and || || is the magnitude

u = (1,5)   v= (7,-4)

u dot v = (1*7 + 5*-4)  = 7-20 = -13

||u|| = sqrt( 1^2 +5^2) = sqrt(1+25) = sqrt(26)

||v|| = sqrt(7^2 + (-4)^2) = sqrt(49+16) = sqrt(65)


cos theta = -13/ sqrt(26) sqrt(65)

cos theta = -13 /sqrt(1690)

theta = arccos (-13/sqrt(1690))

theta = 108.43

6 0
3 years ago
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A triangle with a 135° angle​
GuDViN [60]

Answer:

The 135 external angle means its corresponding internal angle is (180–135) 45 degrees. The other internal angle of 65 plus the 45 is 110 degrees. Since the sum of degrees in the angles in a triangle is 180, the other interior angle is (180–110), or 70 degrees.

Step-by-step explanation:

6 0
3 years ago
What is this?<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bf%7D%7B4%7D%20%20-%205%20%3D%20%20-%209" id="TexFormula1" title=
tigry1 [53]

Hey there!

<h2>ANSWER: f=-16</h2><h2>EXPLANATION:</h2>

\frac{f}{4}-5=-9

Simplify both sides and you get:

\frac{1}{4}f-5=9

Now add 5 to both sides and you get:

\frac{1}{4}f=-4

Now you have to multiply both sides and you get:

f=-16(ANSWER)

Hope this helps!

\text {-TestedHyperr}

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3 years ago
give me a division problem involving the division of a decimal by a whole number with an estimated quotient of 7
alina1380 [7]
So one way is to have a number close to 7
14.00000000000000000000001/2
21.00000000000000000001/3
28.000001/4
etc

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3 years ago
Estimate of 403,446 and 396, 755?
vesna_86 [32]
The sum of those is 800,201
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3 years ago
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