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Vlada [557]
3 years ago
11

PLEASE HELP OR ELSE MOM WILL BE REALLY MAD!!!!! Two trains, one going from Boston to New York and the other going from New York

to Boston, started their trips at exactly same time. Speed of the first train was 10 mph less than twice the speed of the second train.How far from Boston station to have the Met in two hours, if the total distance between cities along the railroad is 220 miles?
Mathematics
2 answers:
deff fn [24]3 years ago
7 0

Answer:

140 miles

Step-by-step explanation:

Rufina [12.5K]3 years ago
6 0

Answer:

140 mile

Step-by-step explanation:

d_{1} +d_{2} =220\\2(2x-10+x)=220\\x=40\\d_{1}=2*(2*40-10)=140mile

While x is the speed of the second train.

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Solve and receive BRAINLIST ​
stira [4]
-x+4y= -17
-x= -17-4y multiply everything by -1
x=17+4y

-6X-2y=2
-6(17+4y) - 2y=2
-102-24y-2y=2
-26y=2+102
-26y=104
y= -104/26
y= -4

x=17+4y
x=17+4•4
x=17+16
x=33
8 0
3 years ago
Natalie earned $200 in interest and 30 months with a beginning balance of $1040. What was her interest rate?
rjkz [21]

The interest rate is 7.69%

Step-by-step explanation:

Given

Interest = $200

Time = t = 30 months

Time will be converted into years as the rate is applied yearly

So,

1 year = 12 months

30 months = 30/12 years = 2.5 years

Principal amount  = $1040

The formula for interest is:

I  = P*r*t

Putting the values

200 = 1040 * r * 2.5\\200 = 2600r\\r = \frac{200}{2600}\\r = 0.076923

Converting into percentage:

r = 7.6923

Rounding off to nearest hundredth

r = 7.69%

Hence,

The interest rate is 7.69%

Keywords: Interest, percentage

Learn more about interest at:

  • brainly.com/question/899976
  • brainly.com/question/884169

#LearnwithBrainly

5 0
3 years ago
Consider this equation. cos(θ)= -3/10 If θis an angle in quadrant II, what is the value of tan (θ)?
Alja [10]

Answer:

C)

Step-by-step explanation:

Trigonometry ratio:

         \sf Cos \ \theta = \dfrac{Adjacent \ side}{hypotenuse}=\dfrac{-3}{10}

We need to find the opposite side using Pythagorean theorem.

 opposite side² = hypotenuse² - adjacent side²

                           = 10² - (-3)²

                            = 100 - 9

                           = 91

opposite side    = √91

                 \sf tan \ \theta = \dfrac{opposite \ side}{adjacent \ side}

                           \sf = \dfrac{\sqrt{91}}{3}

In quadrant II, value of tan \theta is negative.

              \sf tan \ \theta = -\dfrac{\sqrt{91}}{3}

7 0
2 years ago
/: I am at home.
Masja [62]
This is a Logic Problem. So we need to use operators to solve this problem. There are several operators in logic. Operators can be <em>monadic</em> or <em>dyadic</em>. A monadic operator operates on a single simple statement. Other operators will all be dyadic operators <span>because they operate on two simple statements. So in this problem we have the following operators:
</span>
1. The negation operator:

<u>Symbol:</u> ~
<u>Symbol name:</u> Tilde
<u>Parts of negation</u><span><u>:</u> A simple statement with a tilde preceding it</span>

2. Conjunction:

<u>Symbol:</u> &
<u>Symbol name:</u> Ampersand
<u>Parts of conjunction:</u> <span>Two simple statements joined by the conjunction symbol. 
</span>
So we can name the statements as follows:

A: I am at home
B: I am playing video games

So the translations is as follows:

~(A&B) = It is not the case that I am at home and am playing video games
4 0
3 years ago
HELP PLEASE I AM TIMED PLZZZZ!!!!!!!!!!!!!
steposvetlana [31]

Answer: t = 34

Step-by-step explanation:

Since 15 was multiplied by two to get 30 as the denominator, you would multiply 17 by 2 therefore getting 34 = t.

7 0
3 years ago
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