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Alex777 [14]
3 years ago
11

What’s a and b in these 3? 20 points + brainliest

Mathematics
2 answers:
anzhelika [568]3 years ago
4 0

Answer:

1) a 130° - (360 - (50×2)) /2

B 50° - opposite angles

2) a 25° - 90° - 65 = 25 °

B 270° - 360° - 90° = 270°

3) a ) 60° - 180° - 120° = 60° (there are 180° in a straight line)

B) 90° - 180°-90° = 90°

IceJOKER [234]3 years ago
4 0

Answer:

a.

a°=130

b°=50

b

a°=25

b°=270

c

a°=60

b°=90

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Write an eqaution in slope-intercwpt form for the line with slope -5 and y-intercept 9
DerKrebs [107]

Answer:

y = -5x + 9

Step-by-step explanation:

Slope-intercept form of an equation is:

y = mx + b

Since they gave you the slope and y-intercept, it is kind of a fill-in-the-blank problem. Nothing to calculate!

Fill in the slope for the m. Fill in the y-intercept for the b.

y = -5x + 9

6 0
2 years ago
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3 years ago
Tammy has scored 82, 78, and 93 on her previous three tests. What score does she need on her next test so that her average (mean
Lyrx [107]

Answer:

She needs a grade of 71 on her next text.

Step-by-step explanation:

Mean of a data-set:

The mean of a data-set is the sum of all values in the data-set divided by the number of values.

Tammy has scored 82, 78, and 93 on her previous three tests.

Thus, her grades are 82, 78, 93 and x, in which x is her grade in the fourth test.

There are 4 tests.

What score does she need on her next test so that her average (mean) is 81?

We have to find x when the mean is 81. So

\frac{82 + 78 + 93 + x}{4} = 81

253 + x = 324

x = 324 - 253

x = 71

She needs a grade of 71 on her next text.

5 0
3 years ago
If a lawnmower was regularly $150 and is on sale for $120. By what percentage was the price decreased?/
topjm [15]
The percent decrease is 20%.
150 - 120 = 30
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0.2 as a percent is 20
Old - New
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4 0
3 years ago
Please helppppppppppppppppppppppppppppp
Jobisdone [24]

Answer:

54

Step-by-step explanation:

angle A+angle B+Angle C =180 degree [ angle sum property of a triangle]

36 +90 + angle B =180 degree

126 +angle B =180 degree

angle B= 180-126

54 degree

Ans

5 0
3 years ago
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