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SVETLANKA909090 [29]
2 years ago
5

Simplify the expression 6 - 2x + 5+ 42. Hint: Your final expression shoul donly have two terms.

Mathematics
1 answer:
il63 [147K]2 years ago
3 0

Answer:

-2x+53

Step-by-step explanation:

42+5+6=53

leave the -2x

(the two is negative because we were previously subtracting)

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Train a travel 175 miles in a four hours. for train b y=43.5x represents its rate of speed over the same 4 hours which train tra
stepan [7]

Answer:

Train A is faster by a factor of 1.01

Step-by-step explanation:

Given:

Train A:

Distance = 175 Miles

Time = 4 Hours

Train B:

y=43.5x

To Find:

which train travels at a faster rate in by what factor  =?

Solution:

The speed of the train A = \frac{Distance}{time}

The speed of train A  =\frac{175}{4}

The speed of train A = 43.75 miles per hour

Speed of the train B is the slope of the given line

The standard equation of the slope of the line is

y = mx+b

where m is the slope

and we are given with

y = 43.5x

So comparing with the standard equation

m = 43.5

Hence the speed of train B is 43.5  miles per hours

Train A travels faster

Rate =\frac{\text{speed of train A}}{\text {Speed of train B}}

rate  = \frac{43.75}{43.5}

rate  =1.01

7 0
3 years ago
《MATHEMATICS》
Law Incorporation [45]
<h2>Hey,there..</h2>

{3}^{2} -  {2}^{2}  \\ (3 + 2) \times (3 - 2) \\ 5 - 1 \\  = 4

2) \frac{1}{2} + \frac{2}{3} \\

\frac{3+2}{6} \\

\frac{5}{6}

<h2>Hope it helps...</h2>
5 0
2 years ago
Read 2 more answers
A question for people to answer because I’m bored honestly- I want to see who gets it right
frozen [14]

Answer:

the answer is 4

Step-by-step explanation:

my step by step explanation is that whatever i say is right so i could probably say that it is 5 and still get it right just bc i said it

8 0
2 years ago
Read 2 more answers
Given: KLMN is a trapezoid, KF =10 MF ║ LK AKLMF = AFMN Find: KN
Nimfa-mama [501]
You can see the trapezoid in the attached picture.

The data given in the problem are:
KF = 10
LK // MF
A(KLMF) = A(FMN)

We know that KLMF is a parallelogram because:
LM // KF (bases of the trapezoid) 
LK // MF (hypothesis).
The area of a parallelogram is given by the formula: 
A(KLMF) = b × h
               = KF <span>× h</span>
               = 10 × h

The area of a triangle is given by the formula:
<span>A(FMN) = (b × h) / 2
             = (FN </span>× h) / 2

The problem states that the two areas are congruent, therefore:
A(KLMF) = <span>A(FMN)
</span>10 × h = FN <span>× h / 2
10 = FN </span><span>/ 2
FN = 20

Therefore we can calculate:
KN = KF + FN = 10 + 20 = 30

Hence, KN is 30 units long.</span>

3 0
3 years ago
15 (x – 1) + 4 ( x + 3 ) = 2 ( x + 9) + 4
Rudiy27

Answer:

x=1.47

Step-by-step explanation:

15(x-1)+4(x+3)=2(x+9)+4

15x-15+4x+12=2x+18+4

19x-3=2x+22

17x=25

x=25/17

x=1.47

3 0
3 years ago
Read 2 more answers
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