MATH PLEASE HELP!!!!!!!!

Answer:

2hr 48 minutes

Step-by-step explanation:

65t + 85t = 420

150t = 420

t = 2 120/150 = 2 4/5 = 2hr 48 minutes

Time taken by two trains to cover 420 miles is 2hr 48 minutes.

Given, that two trains are travelling towards each other.

Relation between speed, time and distance:

Distance = Speed × Time

When the two trains are travelling towards each other the speeds of two trains are added.

When the two trains are moving in same direction then the relative speed is difference of the two.

So, here the trains are moving towards each other.

65t + 85t = 420

150t = 420

t = 420/150

t = 42/15

t = 2hr 48 minutes

Therefore total time required by two trains to meet is  2hr 48 minutes.

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Answer:

36

Step-by-step explanation:

Answer:

36

Step-by-step explanation:

Answer:

117 - 86 = 31°

The answe is 31

Answer:

Step-by-step explanation:

Is there an image or question?

Answer:

23/4

Step-by-step explanation:

Answer:

A mixed number is an addition of its whole and fractional parts.

[tex]5 \frac{3}{4} [/tex]

Add:

[tex]5 \: and \: \frac{3}{4} [/tex]

To write 5 as a fraction with a common denominator, multiply by

[tex] \frac{4}{4} [/tex]

Combine:

[tex]5 \: and \: \frac{4}{4} [/tex]

Combine the numerators over the common denominator.

[tex] \frac{5.4 + 3}{4} [/tex]

Simplify the numerator.

Multiply 5 by 4.

Add 20 and 3.

[tex] \frac{23}{4} [/tex]

Step-by-step explanation:

Thanks!!!!!!

I HOPE IT WILL HELP YOU.

Thank you.

Answer:

7.5 < 7.5061 < 7.56 < 9.213

Step-by-step explanation:

Answer:-4

Step-by-step explanation:we can easily see it on the graph

Answer:

the first one

Step-by-step explanation:

1/2 and 1/5 common denominator is 10

Answer:

sorry I can't understand the word

Answer:

96 in^2.

Step-by-step explanation:

It has 6 surfaces each of area 4*4 = 16

Answer is 6*16 = 96.

Answer:

x = 2

Step-by-step explanation:

8

−

8

−

=

3

(

6

−

2

)

{\color{#c92786}{8x}}-8{\color{#c92786}{-x}}=3(6-2x)

8x−8−x=3(6−2x)

7

−

8

=

3

(

6

−

2

)

Answer:

|x+1| = x - 1   has no solution.

Step-by-step explanation:

One interpretation of |x - a| is “the distance between the numbers x and a. So |x - b| = c means that the distance between x and b is equal to c . For this to have any solutions, we need c >= 0. When c >0 there will be exactly two solutions, one to the left of b and one to the right of b. When c = 0, the solution is unique: x = b. So, now you should be able to select the only values for b and c that produce the desired set of solutions.

Answer:

=- 1/6

Step-by-step explanation:

=7/12 - 3/4

=7-9/12

=-2/12

=-1/6

Answer:

209

Step-by-step explanation:

Answer:

No

Step-by-step explanation:

Answer:

7.4

Step-by-step explanation i took the test

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

x - x/2 - 6.8 = -3.1

x = 7.4

The temperature at the beginning of the day was 7.4°F.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

The temperature at the beginning of the day = x

The temperature during the day = x/2

The temperature after the sun goes down = 6.8°F

The temperature at the end of the day = -3.1°F

Now,

We can write an expression as,

x - x/2 - 6.8 = -3.1

x - x/2 = -3.1 + 6.8
x/2 = 3.7

x = 7.4°F

Thus,

The temperature at the beginning of the day was 7.4°F.

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Base 10 blocks are used to perform arithmetic operations.

To model the product of 3 and 0.51, Evan needs 3 copies of 5 tenths and 1 hundredths.

The expression can be represented as:

[tex]\mathbf{3 \times 0.51}[/tex]

Express 0.51 as 0.5 + 0.01

[tex]\mathbf{3 \times 0.51 = 3 \times (0.5 + 0.01)}[/tex]

Hence, Evan needs 3 copies of 5 tenths and 1 hundredths.

Read more about base 10 blocks at:

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Answer:

alternate angles are equal

Step-by-step explanation:

Answer: 17 bags

Step-by-step explanation:

425/25= 17

Answer:

Step-by-step explanation:

a) Volume of prism: 6 units x 4 units x 7 units = 168 cubic units

b) Area of shaded base: 4 units x 7 units = 28 square units

Volume of prism: 6 x 4 x 7

Answer:

130 will be correct answer

Step-by-step explanation:

The three angles are

34° 70° and 126°

we have to find fourth angle

let us consider fourth angle as X

The sum of quadrilateral is 360°.

So

34°+70°+126°+ x = 360°

130+X =360°

X = 360°-130°

X = 230°

Here we got the fourth angle

m=number of miles

A=$110+$0.50m

B=$80+$0.80m

$110+$0.50m=$80+$0.80m Subtract ($80+$0.50m)

$30=$0.30m Divide each side by $0.30

100=m ANSWER: More than 100 miles must be driven per day to make Company A a better deal.

Answer:

k=2

Step-by-step explanation:

2x-8y+k/2=0

puting the values of x and y

2*2-8*1+k/2=0

4-8+k/2=0

-4+k/2=0

k/2=4

sing changes if side changed

k=4/2

k=2

We first substituted the X and Y in the equation, so 2 instead of X and 1 instead of Y.

Then I moved the K to make it the subject of the equation by algebra which gave me a -K, but I want k not negative k so I multiplied everything by -1 because, -1 × -1= +1 so K=2.

Answer:

1.2

Step-by-step explanation:

it's so easy it's 1.2

Answer:

The opposite of -1.2 is 1.2

The opposite of a negative number is always a positive number and vice versa.

Hope this helps you!

~Just a joyful teen

[tex]GraceRosalia :)[/tex]

Answer: where is the rest of the problem

Step-by-step explanation:

-$107.85

Answer:

Step-by-step explanation:

22