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amm1812
3 years ago
14

can someone please help with my geometry homework?? i haven't been in the class for a year and i'm starting off the second semes

ter completely blind to everything!! please help

Mathematics
1 answer:
sattari [20]3 years ago
3 0
Ok so for number 5, AB is proportional to BC just like PQ is proportional to QR. AB = 9, BC = 15, PQ = 3, and QR = x. 9/15 = 3/x. Cross Multiply: This gives you - 9x = 45. Divide both sides by 9, and you get x = 5. QR = 5
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I need the answer plz
lakkis [162]

Answer:

GH = 7\sqrt{2}

Step-by-step explanation:

Using the sine ratio in the right triangle and the exact value

sin45° = \frac{1}{\sqrt{2} }

sin45° = \frac{opposite}{hypotenuse} = \frac{HI}{GH} = \frac{7}{GH} = \frac{1}{\sqrt{2} } ( cross- multiply )

GH = 7\sqrt{2}

5 0
3 years ago
Multiply (2x-5)(3x^2-4x+2)
fgiga [73]

Answer:

\large\boxed{(2x-5)(3x^2-4x+2)=6x^3-23x^2+24x-10}

Step-by-step explanation:

\text{Use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\(2x-5)(3x^2-4x+2)\\\\=(2x)(3x^2)+(2x)(-4x)+(2x)(2)+(-5)(3x^2)+(-5)(-4x)+(-5)(2)\\\\=6x^3-8x^2+4x-15x^2+20x-10\\\\\text{combine like terms}\\\\=6x^3+(-8x^2-15x^2)+(4x+20x)-10\\\\=6x^3-23x^2+24x-10

7 0
3 years ago
What is an algebraic expression to represent the perimeter of a rectangle with a width of x+5 and a length of 3x+10?
Sveta_85 [38]
We know that the area of a rectangle is equal to the width multiplied by the length. So in this case the algebraic expression is (x+5)*(3x+10). You get 3x^2 +10x +15x +50= 3x^2 +25x +50.
5 0
2 years ago
Please help PLEASE WILL GIVE BRAINS
Serjik [45]
90° : )




the answer is 90 degrees :)
8 0
3 years ago
Between which two consecutive whole numbers does 86 lie? Fill out the sentence below to justify your answer and use your mouse t
Sveta_85 [38]

\boxed{9}\rule[0.35em]{10em}{0.25pt}\stackrel{\sqrt{86}}{\approx 9.27}\rule[0.35em]{17em}{0.25pt}\boxed{10}

5 0
2 years ago
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