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3 years ago

I did the first one I need help on this that’s all

Mathematics

2 answers:

True [87]3 years ago

7 0

The three angles of a triangle sum to 180 degrees.

Angle A + Angle B + Angle C = 180

(5x-25) + (2x+10) + (3x+5) = 180

Combine like terms:

10x -10 = 180

Add 10 to both sides:

10x = 190

Divide both sides by 10:

X = 190/10

X = 19

Now you have a value for x, find the angles:

Angle A = 5x-25 = 5(19)-25 = 95-25 = 70

Angle B = 2x +10 = 2(19) + 10 = 38 +10 = 48

Angle C = 3x +5 = 3(19) +5 = 57 + 5 = 62

70 + 48 + 62 = 180

Alenkasestr [34]3 years ago

6 0

Answer:

m<A = 70 deg

Step-by-step explanation:

The sum of the measures of the angles of a triangle is 180 deg. Add the three measures and set equal to 180. Solve for x. then use the value of x and the expression for m<A to find the measure of angle A.

m<A + m<B + m<C = 180

5x - 25 + 2x + 10 + 3x + 5 = 180

10x - 10 = 180

10x = 190

x = 19

m<A = 5x - 25 = 5(19) - 25 = 95 - 25 = 70

Answer: m<A = 70 deg

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| 3 | 6

× | 2 | 0

| 0 | 0

7 | 2 | 0

7 | 2 | 0:

720/36 + (4 (-92))/36 + (9 (-21))/36

4 (-92) = -368:

720/36 + (-368)/36 + (9 (-21))/36

9 (-21) = -189:

720/36 - 368/36 + (-189)/36

720/36 - 368/36 - 189/36 = (720 - 368 - 189)/36:

(720 - 368 - 189)/36

720 - 368 - 189 = 720 - (368 + 189):

(720 - (368 + 189))/36

| 1 | 1 |

| 3 | 6 | 8

+ | 1 | 8 | 9

| 5 | 5 | 7:

(720 - 557)/36

| | 11 |

| 6 | 1 | 10

| 7 | 2 | 0

- | 5 | 5 | 7

| 1 | 6 | 3:

Answer: 163/36

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