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3 years ago

Does anyone know how to do this ?

Mathematics

1 answer:

Zinaida [17]3 years ago

5 0

Answer:

i really know but just add 65 and 75 then divide it by 2.

Step-by-step explanation:

Hope that was right!

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A train travels from station A to C having distance of 285 miles in 6 hours. During the journey, it reaches intermediate station

Nesterboy [21]

Answer:

Distance between B and C = $3\times 55=165miles$

Step-by-step explanation:

Let the time taken to reach from station A to B be x hr

Let the time taken to reach from station B to C be y hr

Given total time from station A to C be 6 hr

∴ x + y = 6

⇒ y = 6 - x → (1)

Also total distance given is 285 miles

As $Distance=Speed\times Time$

∴ distance travelled between station A and B

= $40\times xmiles$

distance travelled between station B and station C

= $55\times ymiles$

So, 40x + 55y = 285

⇒ 40x + 55(6 -x) = 285 (From 1)

=> 40x + 330 - 55x = 285

=> -15x = 285 - 330

=> -15x = -45 ⇒ x=3

gives y = 6-3 = 3 hours

Distance between B and C = $3\times 55=165miles$

5 0

3 years ago

Can someone answer this question please?

Troyanec [42]

The solution to the inequality $3x-3\leq -15\,\,or\,\,4x-1\geq 11$ is $x\leq -3\,\,or\,\,x\geq 4$

The number line is shown in figure attached.

Step-by-step explanation:

We need to solve the inequality: $3x-3\leq -15\,\,or\,\,4x-1\geq 11$

Solving the inequality:

$3x-3\leq -15\,\,or\,\,4x-1\geq 11\\Adding\,\,3\,\,on\,\,both\,\,sides\,\,and\,\,1\,\,on\,\,both\,\,sides\\3x-3+3\leq -15+3\,\,or\,\,4x-1+1\geq 11+1\\3x\leq -12\,\,or\,\,4x\geq 12$

Divide by 3 and divide by 12

$x\leq \frac{-12}{3} \,\,or\,\,x\geq \frac{12}{4} \\x\leq -4\,\,or\,\,x\geq 3$

So, value of x can be less than equal to -4 or value of x is greater than equal to 3.

The number line is shown in figure attached.

The solution to the inequality $3x-3\leq -15\,\,or\,\,4x-1\geq 11$ is $x\leq -3\,\,or\,\,x\geq 4$

Keywords: Solving inequalities

Learn more about Solving inequalities at:

#learnwithBrainly

7 0

3 years ago

Nine pamphlets weigh a total of 7 1/2 ounces. How much does each pamphlet weigh?

larisa86 [58]

Answer:

5/6 oz/pamphlet

Step-by-step explanation:

Find the unit rate:

7 1/2 oz 15 oz 1

--------------------- = ------------- * -------------------- = 15/18 oz/pamphlet, or

9 pamphlets 2 9 pamphlets

5/6 oz/pamphlet

4 0

3 years ago

Read 2 more answers

Please help quick! Will mark brainliest

Ksju [112]

Area of a triangle is,

$a = \frac{1}{2} ( bh)$

Substitute the numbers,

$210 = \frac{1}{2} (35 \times x)$

$x = 12$

The above number is the base.

Using the pythagorean method let's calculate for "c" the hypotenuse.

$c = \sqrt{ {a}^{2} + {b}^{2} }$

Substitute

$c = \sqrt{ {35}^{2} + {12}^{2} }$

Solve,

$c = \sqrt{1225 + 144}$

Simplify,

$c = \sqrt{1369}$

Calculate one last time,

$c = {37}$

The hypotenuse is 37 inches.

3 0

3 years ago

Max completed 12 questions on the exam. This is 40% of the questions. 1. Write an equation representing this situation. 2. How m

Marrrta [24]

Answer:

Step-by-step explanation:

How many questions are on the exam? Represent this by n.

Then 40% of n comes out to 12 questions, or more symbolically,

0.40n = 12, after which we get n = 12/0.40 = 30

Answers:

(1) 0.40n = 12 is the desired equation.

(2) n = 30 is the number of questions on the exam.

(3) See above for explanations.

7 0

3 years ago