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2 years ago

Each member of a 5-member cross-country team runs a course. Their individual times are as follows:

Mathematics

1 answer:

Pavlova-9 [17]2 years ago

5 0

Answer:

2 hours

Step-by-step explanation:

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3x+4y+6z=15 Solve for x.

aalyn [17]

Answer:

Step-by-step explanation:

<h3>Question:-</h3>

To solve for x

<h3>Equation:-</h3>

3x + 4y + 6z = 15

<h3>Solution:-</h3>

=> 3x + 4y + 6z = 15

[On subtracting both sides with 4y]

=> 3x + 4y + 6z - 4y = 15 - 4y

[On Simplification]

=> 3x + 6z = 15 - 4y

[On subtracting both sides with 6z]

=> 3x + 6z - 6z = 15 - 4y - 6z

[On Simplification]

=> 3x = 15 - 4y - 6z

[On dividing both sides with 3]

$= > \frac{3x}{3} = \frac{15 - 4y - 6z}{3}$

[On Simplification]

$= > x = 5 - \frac{4}{3} y - 2z \: (ans)$

3 0

2 years ago

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Please help! :( If AJKL = ARST, which congruences are true by CPCTC? Check all that apply.

SIZIF [17.4K]

D is the correct answer

6 0

3 years ago

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What is 30% of ( ) equals 60, find the missing number.

mote1985 [20]

Solution:
Let us rewrite 30% as $\frac{3}{10}$ . Let x be the missing number.

$\frac{3}{10}(x) = 60 \\ x = \frac{10}{3}(60) = \frac{600}{3} = 200$

and we are done.

Note: You can do the same method by saying that 30% = 0.3 which would then show us that 60 divided by 0.3 is 200.

7 0

4 years ago

When the equation a – bx = cx + d is solved for x, the result is x = .

pav-90 [236]

The correct answer is:

x=6/7.

Explanation:

First we find the general form by solving for x:

a-bx = cx+d

Subtract a from each side:

a-bx-a = cx+d-a

-bx = cx+d-a

Subtract cx from each side:

-bx-cx = cx+d-a

-bx-cx = d-a

We can divide both sides by -1:

(-bx-cx)/-1 = (d-a)/-1

bx+cx = -d+a

bx+cx = a-d

Factor out an x on the left:

x(b+c) = a-d

Divide both sides by (b+c):

(x(b+c))/(b+c) = (a-d)/(b+c)

x = (a-d)/(b+c)

In this equation, a = 5, b = 6, c = 8 and d = 17:

x = (5-17)/(6+8) = -12/14

This simplifies to -6/7.

8 0

3 years ago

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How do you reduce the ratio 250:400

Mkey [24]

You can divide by 10 and with that its simplified to 25;40...

then you can divede by 5 with that simplified its 5;8

So the answer is 5:8

6 0

3 years ago

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