3 years ago

Given that lines a and b are parallel and that m∠4 = 128°, find m∠7.

Mathematics

1 answer:

Mrrafil [7]3 years ago

6 0

Answer:

(depending on the picture) angle 7=128 or angle 7=52

Step-by-step explanation:

If it is parallel and a line is intersecting it (depending on where angle 4 and angle 7 is located) they are congruent or they are supplementary.

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There is a bag filled with 5 blue and 6 red marbles. A marble is taken at random from the bag, the colour is noted and then it i

il63 [147K]

Answer: 36/121

Step-by-step explanation:

There are 6 red marbles out of total 11.

The probability of drswing two red marbles is 6/11 x 6x11 = 36/121

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2 years ago

What is the value of a?

Annette [7]

Answer:

Step-by-step explanation:

Look at the picture.

The formula of an area of a trapezoid is:

$A=\dfrac{b_1+b_2}{2}\cdot h$

$b_1,\ b_2$ - bases

$h$ - height

We have:

$A=128,\ b_1=a+2,\ b_2=a-2,\ h=8$

Substitute:

$128=\dfrac{a+2+a-2}{2}\cdot8\\\\128=\dfrac{2a}{2}\cdot8$

$128=8a$ <em>divide both sides by 8</em>

$16=a\to a=16$

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2 years ago

The lengths of two sides of a triangle are 11 cm and 19 cm. Identify the range of possible lengths for the third side.

mamaluj [8]

Answer:

2nd option

Step-by-step explanation:

Given 2 sides of a triangle then the third side x is in the range

difference of 2 sides < x < sum of 2 sides , that is

19 - 11 < x < 19 + 11

8 < x < 30

5 0

2 years ago

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(5j - 2q + 2/5) - (4 - 3j - 1/2q)

fenix001 [56]

Answer:

8j - $\frac{3q}{2}$ - $\frac{18}{5}$

Step-by-step explanation:

hope this helps! :D

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2 years ago

Which expression is equivalent to 3(m − 3) + 4?<br><br> 3m + 1<br> 3m − 5<br> 3m + 13<br> 3m − 3

Volgvan

Answer:

3m - 5

Step-by-step explanation:

3(m - 3) + 4 Distribute the 3

3m - 9 + 4 Simplify

3m - 5

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2 years ago

Read 2 more answers