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3 years ago

15

Diana got back her math quiz but Ms. Signer forgot to calculate her final grade. If the quiz had a total of 20 questions on it,

and Diana got four wrong, what was her final grade (written as a percentage)?

1 answer:

svet-max [94.6K]3 years ago

5 0

Answer:

She made a final grade of 80% or you could say she got 20% of the questions wrong.

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What is the interquartile range of the data set (WILL MARK BRAINLIEST)

mixas84 [53]

20,25,30,30,31,40,41,49

median=30.5

Q¹= 27.5

Q³=40.5

40.5-27.5= 13 IQR = 13

4 0

3 years ago

Hi, I need an answer to this question pls. Louisa used Uber which charges $2 for the first mile and $1.10 for each additional mi

Vanyuwa [196]

Answer:

20 miles

Step-by-step explanation:

Let x = amount charge each mile

y = total price paid

Since the Uber charged $1.10 for each mile, we multiply x by 1.1 like this 1.1x

Also, $2 were already charged so we add 2 to the total price

y = 1.1x + 2

Since the Lyft charged $0.95 for each mile, we multiply x by 0.95 like this 0.95x

Also, $5 were arleady charged so we add 5 to the total price

y = 0.95x + 5

We have to find a price where both rides match

1.1x + 2 = 0.95x + 5

Let's move the like terms to one side by subtracting 0.95x from both sides

1.1x + 2 = 0.95x + 5

-0.95x -0.95x

0.15x + 2 = 5

Now, subtract 2 from both sides

0.15x + 2 = 5

- 2 - 2

0.15x = 3

Finally, divide both sides by the coefficient, 0.15, to isolate the variable, x

0.15x/0.15 = 3/0.15

x = 20

This means they traveled 20 miles if they were to pay the same price

7 0

3 years ago

Which ordered pairs make the open sentence true? 3x+y<14 Select all the correct answers. (7, −7) (−1, 6) (3, 6) (4, −1) (6, 0

Jet001 [13]

Answer:

(4, - 1)

(-1, 6)

Step-by-step explanation:

Given the expression :

3x+y<14

Test the opprions to find out the true statement.

(7, - 7)

3(7) + (-7) < 14

21 - 7 < 14

15 < 14 (not true)

(-1, 6)

3(-1) + 6 < 14

3 + 6 < 14

9 < 14 ( true)

(3, 6)

3(3) + 6 < 14

9 + 6 < 14 ( not true)

(4, - 1)

3(4) - 1 < 14

12 - 1 < 14 ( true)

(6,0)

3(6) + 0 < 14

18 < 14 ( not true)

4 0

3 years ago

Given the diagram below. If G is the circumcenter of ABC. DC = 16, GB = 21 and AZ = 19, find each measure.

Jlenok [28]

Answer:

Step-by-step explanation:

Properties of a circumcenter;

1). Circumcenter of a triangle is a point which is equidistant from all vertices.

2). Point where perpendicular bisectors of the sides of a triangle meet is called circumcenter of the triangle.

From the picture attached,

9). AG = GB = GC = 21

10). BC = 2(DC)

= 2×16

= 32

11). By applying Pythagoras Theorem in ΔGFB,

GB² = GF² + FB²

(21)² = GF² + (19)²

441 = GF² + 361

GF² = 441 - 361

GF = $\sqrt{80}$

GF = 8.9

12). By applying Pythagoras theorem in ΔGDB,

GB² = DG² + BD²

(21)² = (DG)² + (16)² [BD = DC = 16]

DG² = 441 - 256

DG = √185

DG = 13.6

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3 years ago

Which of the following expressions is equal to tan205°?

disa [49]

Tan205° = .466 tan55° = 1.428 tan25° = .466 -tan25° = " so just tan25

8 0

3 years ago