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Luba_88 [7]
3 years ago
12

Please helpppp im so lost

Mathematics
1 answer:
saveliy_v [14]3 years ago
6 0
So solution is here:
first question's right answer is second sentence
second question's answer is square

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Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2.4 h, and Car B traveled the dis
S_A_V [24]
Given:
t A = 2.4 h
t B = 4 h
v A = 22 + v B

Solution:
Distance A and distance B is the same, distance could be defined using formula d = v × t
d A = d B
(v A × t A) = (v B × t B)

plug in the numbers
v A × 2.4 = v B × 4
(22 + vB) × 2.4 = 4 vB

remove the parenthesis using distributive property
(22 × 2.4) + (2.4 × vB) = 4vB
52.8 + 2.4vB = 4vB
add like terms
52.8 = 4vB - 2.4vB
52.8 = 1.6vB
52.8/1.6 = vB
vB = 33
the speed of car B is 33 mph

vA = 22 + vB
vA = 22 + 33
vA = 55
the speed of car A is 55 mph
6 0
3 years ago
Find the solution of given expression<br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B2545%20%5Ctimes%202545%7D%20" id="Te
poizon [28]

Answer:

√{2545×2545}=√2545²=±2545

7 0
2 years ago
Read 2 more answers
give the most general solutions to equations. . 2sinxcosx-sin(2x)cos(2x)=0. . A. simplify the first expression using double angl
Zinaida [17]
2sinxcosx - sin(2x)cos(2x) = 0 

<span>Part I </span>
<span>The double angle identity for sine states that sin(2x) = 2sinxcosx </span>
<span>Thus we get: </span>
<span>sin(2x) - sin(2x)cos(2x) = 0 </span>

<span>Part II </span>
<span>sin(2x)(1 - cos(2x)) = 0 </span>

<span>Part III </span>
<span>Either sin(2x) = 0 or </span>
<span>1 - cos(2x) = 0 </span>
<span>=> cos(2x) = 1 </span>

<span>For sin(2x) = 0, this is true for </span>
<span>2x = n(pi) where n = 0, 1, 2, .... </span>
<span>x = n(pi/2) </span>

<span>For cos(2x) = 1, this is true for </span>
<span>2x = n(pi) where n = 0, 2, 4, .... </span>
<span>x = n(pi/2)
</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly.
5 0
3 years ago
Please help! if anybody is good at equivalent polynomial expressions please help!!
scoundrel [369]
The one you have highlighted is correct
7 0
3 years ago
Evaluate the function f(x) = x 2 + 1 for f(2
olasank [31]
F(x)=x^{2} +1
f(2)=2^{2} +1
f(2)=5
6 0
3 years ago
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