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3 years ago

Segment EF is a mid segment of triangle ABC. If EF = 15 cm, what is the measure of segment BC?

Mathematics

1 answer:

vaieri [72.5K]3 years ago

6 0

Answer:

Step-by-step explanation:

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Frank’s quarter grades are 82.5, 94.7, and 87.9. What grade, rounded to the nearest percent, will Frank have to earn in the last

Thepotemich [5.8K]

The given final course grade, 88%, is the average of Frank's four quarter grades. The average is the sum of all grades divided among the four quarters. Let x be the average,
(82.5 + 94.7 + 87.9 + x) / 4 = 88
The value of x is equal to 86.9. Thus, the answer is letter C. 87%.

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3 years ago

Use the number line to find the measure of AC. A) 2 B)4 C)6 D)8

gizmo_the_mogwai [7]

There is no number line...

6 0

2 years ago

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The base of a triangle is 9/4 times of its height. If the area of triangle is 144 cm2. Find the height and the base.

Mazyrski [523]

Step-by-step explanation:

Given that the base of triangle is 9/4 times of its height . And area is 144 cm² . Let the height be h , then its base be 9h/4 .

• According to Question :-

$\tt\to Area_{(\triangle)}=\dfrac{base\times height}{2}\\\\\tt\to 144cm^2 = \dfrac{9h\times h}{4\times 2 } \\\\\tt\to h^2 =\dfrac{12\times 12 \times 2 \times 2 }{3\times 3 }\\\\\tt\to h =\sqrt{\dfrac{12\times 12 \times 2 \times 2 }{3\times 3 }}\\\\\tt\to h =\dfrac{(12)(2)}{3} \\\\\tt\to \boxed{\orange{\tt h = 8 cm }}$

Therefore ,

Height = h = 8cm .
Base ,= 9h/4 = 18cm .

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2 years ago

two years ago the cats tim and tom were toghether 15 years old.Now tom is 13 years old.In how many years will tim be 9 years old

Norma-Jean [14]

Answer:

3 years

Step-by-step explanation:

As with many age problems, you can reason it without equations. If Tom is 13 now, 2 years ago he was 11. If the total age of the two cats at that time was 15, then Tim was 15 -11 = 4.

That means Tim is now 4+2 = 6, so will be 9 in 3 years.

_____

Additional comment

If you want to write equations, there are several ways you can do it. We often like to use variables to represent the current age. We can assign ...

x = Tim's current age; y = Tom's current age.

The sum of their ages 2 years ago was ...

(x -2) +(y -2) = 15

Tom's current age is 13, so we have y=13. Using that in the equation gives ...

x -2 +13 -2 = 15

x = 6 . . . . . . . . . . subtract 9, collect terms

That's Tim's current age, so Tim will be 9 years old in 3 years.

3 0

1 year ago

Write the slope intercept form of the equation of each line

luda_lava [24]

Answer:

2. y=3/2x-3

3. 3/1x

Step-by-step explanation:

just find the y-intercept first cuz those once r easy to find (y=mx+b)

slope just do rise/ run or y2-y1/x2-x1 method

ik this doesnt make sense but hope this helps

5 0

2 years ago

Read 2 more answers