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3 years ago

David rode his bicycle for 6 hours and jogged for 8 hours during the

Mathematics

2 answers:

AnnyKZ [126]3 years ago

8 0

72 hours I hope this helps

slega [8]3 years ago

4 0

Answer:

72 hours

Step-by-step explanation:

Because if he bikes 54 then he will need to do 8 x 9 = 72 because if he biked 54 hours then he did 6 x 9 = 54 so the answer is 72 hours (u multiply by 9) hope this helps

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A scale reports a 15-pound weight as weighing 12.375 pounds. Which of the following is true?

rusak2 [61]

Answer:

Step-by-step explanation:

If it is accurate then it would have gotten the correct weight, but by going down to the thousandths it would be precise

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3 years ago

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There are 9 female performers in a dance recital. The ratio of men to women is 2:3. How many men are in the dance recital?

Firdavs [7]

Answer:

6 men

Step-by-step explanation:

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3 years ago

Fractions are equal to 12 /18 is

Amanda [17]

Answer:

2/3

Step-by-step explanation:

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3 years ago

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Find the value of x such that the area of a triangle whose vertices have coordinates (6, 5), (8, 2) and (x, 11) is 15 square uni

Serjik [45]

Answer:

$x =12\ or\ -8$

Step-by-step explanation:

Given

$(x_1,y_1) = (6,5)$

$(x_2,y_2) = (8,2)$

$(x_3,y_3) = (x,11)$

$Area = 15$

Required

Find x

The area is calculated as thus:

$Area = \frac{1}{2}|x_1(y_2 - y_3) + x_2(y_3 - y_1) + x_3(y_1 - y_2)|$

Substitute values

$15 = \frac{1}{2}|6*(2 - 11) + 8*(11 - 5) + x(5 - 2)|$

$15 = \frac{1}{2}|6*(-9) + 8*(6) + x(3)|$

$15 = \frac{1}{2}|-54 + 48 + 3x|$

$15 = \frac{1}{2}|-6 + 3x|$

Multiply through by 2

$2 * 15 = \frac{1}{2}|-6 + 3x| * 2$

$30 = |-6 + 3x|$

Remove absolute sign

$30 = -6 + 3x\ or\ -30 = -6 + 3x$

Add 6 to both sides

$36 = 3x\ or\ -24 = 3x$

Divide by 3

$12 = x\ or\ -8 = x$

$x =12\ or\ -8$

<em>So, the coordinates are (-8, 11) or (12,11)</em>

3 0

2 years ago

Melissa notes that her savings account earned $54.93 in nine months. If the

djyliett [7]

Answer:

$135.63

Step-by-step explanation:

first and foremost, the formula for interest is I = Prt. P is the principal, r is the rate, and t is the time.

so plug in the numbers you have. Always convert the rate to a decimal. The rate would be 0.0.45. Plug in 54.93 for the I and plug in 9 for the time. It would look like this:

54.93 = P(0.045)(9) --> 54.93 = 0.405P --> P = 135.63

4 0

3 years ago