4 years ago

The expanded form of this number. 26,779

Mathematics

1 answer:

anygoal [31]4 years ago

8 0

Answer:

20000+6000+700+70+9

Step-by-step explanation: just put the number then change all of the numbers behind it to 0, add a + and contuntinue, if you find a 0 just skip it

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Find each measurement indicated. Round your answer as the nearest tenth. HELP PLEASE!!!!!! URGENT

MaRussiya [10]

Answer:

(1) length AB = 21.0

(2) length BC = 45.0

Step-by-step explanation:

(1) To determine AB, apply Cosine rule;

$|AB|^2 = |AC|^2 + |BC|^2 \ - \ 2[|AC| \times |BC]cos \ C\\\\|AB|^2 = 13^2 + 29^2 \ - \ 2(13 \times 29) cos(41)\\\\|AB|^2 = 1010 - 569.05\\\\|AB|^2 = 440.95\\\\|AB|= \sqrt{ 440.95} \\\\|AB| = 21.0$

(2) To determine BC, also apply cosine rule;

$|BC|^2 = |AB|^2 + |AC|^2 \ - \ 2[|AB| \times |AC]cos \ A\\\\|BC|^2 = 30^2 + 21^2 \ - \ 2(30 \times 21) cos(123)\\\\|BC|^2 = 1341 - (-686.245)\\\\|BC|^2 = 1341 + 686.245\\\\ |BC| = 2027.245\\\\|BC|= \sqrt{ 2027.245} \\\\|BC| = 45.0$