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Travka [436]
3 years ago
8

Joe read 140 pages of his 300 page book what percent of his book has he read

Mathematics
1 answer:
kaheart [24]3 years ago
8 0

Answer:

47

Step-by-step explanation:


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Let r3 have the euclidean inner product. let u = (-1, 1, 1) and v = (-7, 6, 15). if ||ku + v||= 7, what is k? give the exact ans
amm1812
Mak\mathbf u+\mathbf v=k(-1,1,1)+(-7,6,15)=(-k-7,k+6,k+15)

Recall that for a vector \mathbf x\in\mathbb R^n, we have \|\mathbf x\|=\sqrt{\mathbf x\cdot\mathbf x}. So we have

\|k\mathbf u+\mathbf v\|=\sqrt{(k\mathbf u+\mathbf v)(k\mathbf u+\mathbf v)}=7
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\implies3k^2+56k+261=0
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2 years ago
Jennifer has 7 marbles in her bag. She has 4 blue, 1 white, 1 pink, and 1 yellow. She chooses one marble without looking. What i
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all of the above

Step-by-step explanation:

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3 years ago
Select the correct answer. A model rocket was launched from the top of a building. The rocket's approximate height can be modele
garri49 [273]

Answer:

13 seconds.

Step-by-step explanation:

Given

h = -4.9(t - 13)(t + 2).

Required

Determine a reasonable solution for t

To do this, we equate h to 0.

h = -4.9(t - 13)(t + 2). becomes

0 = -4.9(t - 13)(t + 2).

Divide through by -4.9

0 = (t - 13)(t + 2).

Reorder the expression

(t - 13)(t + 2) = 0.

Split

t-13 = 0 or t + 2 = 0

This gives:

t = 13 or t = -2

But time can't be negative, So:

t = 13

6 0
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564 in scientific notation
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Answer:  5.64 *10^2

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Need help immediately!!!!!!!
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Answer:

C)

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