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3 years ago

The incorrect work of a student to solve an equation 2(y + 6) = 4y is shown below:

Mathematics

2 answers:

lord [1]3 years ago

7 0

Answer:

option 1 (2 should be distributed as 2y + 12; y = 6)

Step-by-step explanation:

Given: Equation = 2(y+6)=4y

To find : the correct step 2

To solve this equation the steps are as follow :

Step 1: 2(y + 6) = 4y

Step 2: 2y + 12 = 4y

Step 3: 2y = 12

Step 4: y = 6

To correct step 2 we have to replace 8 by 12 because 2×6=12

Therefore option 1 is correct -2 should be distributed as 2y + 12; y = 6

sladkih [1.3K]3 years ago

4 0

The correct steps to solving this problem:

Step 1: 2(y+6) = 4y
Step 2: 2y + 12 = 4y
Step 3: 12 = 2y
Step 4: y = 6

The first option explains how to correct Step 2 and shows the correct y value.

I hope that this helps you :)

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X²-10x+25=0 quadratic equation by factoring

lisov135 [29]

Answer:

x = 5

Step-by-step explanation:

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3 years ago

Of the employees who work at Stalling Printing, 90% attended the safety procedures meeting. If 63 employees attended the meeting

LUCKY_DIMON [66]

There are 70 employees who work at Stalling Printing.

Take note that the 63 employees who attended the meeting represents 90% of the total number of employees working at Stalling Printing. To get the total number of employees or the 100% number of employees, divide 63 by its percentage, 90%.

63/90% or 63 / 0.90 = 70 total number of employees.

Out of 70 employees; 63 employees attended the meeting and 7 employees did not.

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3 years ago

What is 4 to the square root of 2

shutvik [7]

Answer:

7.10299

Step-by-step explanation:

$4^{\sqrt{2} }$ is best evaluated in a calc.

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2 years ago

Read 2 more answers

Please help me with this use the screen shot

dezoksy [38]

Okay so this is a wild guess but I would say 12. The whole angle is 90, but only 1/3 of that is in the smaller portion of the triangle. So, I assumed that 1/3 of the length of the whole triangle. Three times 6 is 18 and minus AD is 12. So BD=12? This is my best guess hope it helps

4 0

3 years ago

Can someone help me?

Oxana [17]

Answer:

Step-by-step explanation:

To start calculating, we first need to make some proof.

Firstly, since AB = AC, we know that ΔABC is isosceles, which means that ∠ABC = ∠ACB.

Now, looking only to ΔBDE and ΔCDF, we can see that they are similar, because the two of its angles are congruent:

∠BED=∠CFD

∠DBE=∠DCF

To make it easier to visualize which are the corresponding vertexes, we can draw them like this:

And we need to remember that BC is 24, so:

BD+CD=24

Since the triangles are similar, their corresponding sides have constant ratio, which we can calculate from the corresponding sides DE and CF:

$r=\frac{CF}{DE} =\frac{7.5}{4.5} =\frac{5}{3}$

This ratio is the same for the other corresponding sides, so we can apply that for BD and CD:

$r=\frac{CD}{BD} =\frac{5}{3}\\
 \frac{BD}{CD}=\frac{3}{5} \\\\
BD=\frac{3}{5} Cd$

Thus, the measure of CF is approximately 13, alternative D.

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2 years ago