3 years ago

I need help with 4ourth grade math lesson 8 homework helper asap math

Mathematics

1 answer:

Dmitriy789 [7]3 years ago

3 0

Answer:

sure

Step-by-step explanation:

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Rice costs $x per kilogram.

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$1.3

Step-by-step explanation:

12x+7x+7=31.7

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3 years ago

What number 5 answer

DanielleElmas [232]

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Tim's phone service charges $23.02 plus an additional $0.19 for each text message sent per month. If Tim's phone bill was $27.77

xeze [42]

Answer:

Step-by-step explanation:

23.02 plus an additional 0.19 for each text.....x = # of texts

$ 0.19x + 23.02 = 27.77 is ur equation

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3 years ago

Given any triangle in the plane, associate to each side an outward pointing normal vector of the same length as the side. Show t

Zigmanuir [339]

Let , a, b and c be the length of three sides of triangle, represented in terms of vectors as $\vec{a},\vec{b},\vec{c}$ .

Now, vector of same Magnitude acts as normal vector to each side.

So, equation of any vector p having normal q is given by

$\vec{p} \times\vec{q}$

Now sum of three vector and it's normal is given as

$=\vec{a} \times\vec{a}+\vec{b} \times\vec{b}+\vec{c} \times\vec{c}\\\\=0+0+0\\\\=0$

Cross product of two identical vectors is Zero.

$\rightarrow \vec{i} \times\vec{i}=0$

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3 years ago