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3 years ago

HELP ME PLEASE!! Word problem, what's wrong? explain.

Mathematics

1 answer:

dmitriy555 [2]3 years ago

8 0

Answer:

She made a mistake in Step 7.

Step-by-step explanation:

Step 1 through 6 are correct. Only from Step 6 to Step 7 the problem comes in: both sides of the equation are multiplied by x, however the x on the left side, by error, becomes 1. The correct state in Step 7 should look like this:

$x(\frac{1}{2}P-x)=256$

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Which equation represents the line that passes through (-6, 7) and (-3, 6)?

Leto [7]

Answer:

Step-by-step explanation:

Use the formula y1-y2÷x1-x2

7-6÷(-6)-(-3)

7-6=-1

(-6)-(-3)=3

So, you know that you have a slope of -1/3. so, b would be your answer

3 0

3 years ago

The terminal point of Dis ( 1/2,3/2). What is cos 0?

nydimaria [60]

Answer:

(c). $\frac{1}{2}$

Step-by-step explanation:

The cosine is the "x" coordinate of the terminal point on the unit circle.

Thus the answer is (c).  $\frac{1}{2}$

5 0

3 years ago

I have $25 all in nickels and dimes. There are twice as many Nickles as dimes. How many of each are there?

Mama L [17]

Answer:

N=250

Step-by-step explanation:

"twice as many nickels as dimes" means N =2D [eq1]

"collection of nickels and dimes is worth $25" means

5N + 10D = 2500 [eq2]

(To avoid using decimal points, PLZ express everything in cents.)

Substitution (substitute N from eq1 into eq2]:

5(2D) + 10D = 2500

10D + 10D = 2500

20D = 2500

D = 125

N=2D [eq1 again]

N=2(125)

N=250

Check:

Is 5(250) + 10(125) = 2500 ?

1250 + 1250 = 2500 ?

2500 = 2500 ?yes

7 0

2 years ago

Vernon's work for finding the value of x is shown below. Lines A C and B D intersect at point E. Angle A E D is (16 x + 8) degre

Marta_Voda [28]

Answer:

No, he should have set the sum of ∠AED and ∠DEC equal to 180°, rather then setting ∠AED and ∠DEC equal to each other

Step-by-step explanation:

Find the diagram attached

If line AC and BD intersects, then m<AED + m<DEC = 180 (sum of angle on a straight line is 180 degrees)

Given

m<AED = 16x+8

m<DEC = 76 degrees

16x + 8 + 76 = 180

16x + 84 = 180

16x = 180-84

16x = 96

x = 96/16

x = 6

Hence the value of x is 6

Hence the correct option is No, he should have set the sum of ∠AED and ∠DEC equal to 180°, rather then setting ∠AED and ∠DEC equal to each other

5 0

2 years ago

Read 2 more answers

5. The average weight of a blue whale is 4 x 105 pounds. The average weight of an elephant is 1 x 10 pounds. How many more times

solong [7]

Answer:

42 more times

Step-by-step explanation:

1) 4×105=420 (pounds)-blue whale

2) 1×10=10 (pounds)- elephant

3) 420:10=42

7 0

2 years ago