3 years ago

Pls answer these 2 questions

Mathematics

2 answers:

Tju [1.3M]3 years ago

7 0

7. 64%of40=62.5 10. 85%of 40= 34

storchak [24]3 years ago

4 0

7. 48
10. 34 have a good day

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Answer:

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Step-by-step explanation:

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2 years ago

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tatiyna

If the face is a square, then (l*l)

If the face is a triangle, then (b*h)(1/2)

If the face is a rectangle, then (l*w)

If the face is a circle, then (r²)(3.14)

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3 years ago

Factorize the following algebraic expression:

Hoochie [10]

X^2+16-38=0
find what 2 numbers multiply to get -38 and add to get 16
find factors of 38
2 times 19
there is no way to use common factor so use quadratic formula which is
x= $\frac{ -b+\sqrt{b^2-4ac} }{2a}$ or x= $\frac{ -b-\sqrt{b^2-4ac} }{2a}$

ax^2+bx+c=0 subsitte
a=1
b=16
c=-38
subsitute
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so the answers for x are $-8+\sqrt{102}$ and $-8-\sqrt{102}$ which are aprox -2.099504938362 and +18.099504938362
so it would be
(x-[-8+√102])(x+[8+√102])=0

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2 years ago

A lot contains 12 items, and 4 are defective. If three items are drawn at random from the lot, what is the probability they are

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Answer:

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Step-by-step explanation:

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2 years ago

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