Evelyn answered 42 questions correctly on her multiple choice history final and earned a grade of 21%. How many total questions were on the final exam?

Answer:

(7,6)E=-5|100510>

Step-by-step explanation:

128211~}>■•

Step-by-step explanation:

1. The vertex is the x coordinate of the lowest point of the parabola. The lowest possible point is (1,-2). So our vertex is 1.

2. The axis of symmetry passes through the vertex so the axis of symmetry is at the line x=1 .

3. X intercepts are what are the x values when y =0. The x intercepts are -2 and 4.

4.Reflect the point 7,6 across the line x=1. A point symmetric to it is (-5,6)

Answer:

Step-by-step explanation:

Number of animals after 5 years:

Answer:

The answer is p = 2.

Step-by-step explanation:

1) Divide both sides by 9.

[tex]p - 4 = - \frac{18}{9} [/tex]

2) Simplify 18/9 to 2.

[tex]p - 4 = - 2[/tex]

3) Add 4 to both sides.

[tex]p = - 2 + 4[/tex]

4) Simplify -2 + 4 to 2.

[tex]p = 2[/tex]

Therefor, the answer is p = 2.

Answer:

p =2

Step-by-step explanation:

9(p-4) =-18

9p-36=-18

9p = -18 +36

9p = 18

divide both side by 9

p =2

Answer:

39%

Step-by-step explanation:

83-last price

83 last price

100 x ?

100 * last price = 83 . x

x= 39

Answer:

m = 134°

Step-by-step explanation:

m and 134° are vertical angles and are congruent, then

m = 134°

Answer:

3rd one

Step-by-step explanation:

2l + 2w = P

2w = P - 2l

w = P - 2l / 2

Therefore, the equivalent equation to the given equation is [tex]w=P-\frac{1(L)}{2}[/tex].

What is the equation?

The definition of an equation is a mathematical statement that shows that two mathematical expressions are equal.

Here given equation is

[tex]2L + 2w = P\\\\2(L+w)=P\\\\L+w=\frac{1}{2}P\\\\w=\frac{1}{2}P-L\\\\w=\frac{P-2L}{2}\\\\w=P-\frac{1}{2}L[/tex]

Hence, the equivalent equation to the given equation is [tex]w=P-\frac{1(L)}{2}[/tex].

To know more about the equation

https://brainly.com/question/12788590

#SPJ2

Answer:

2m-44

Step-by-step explanation:

this is the answer

Answer:

90 Degrees

Step-by-step explanation:

<LMN is an interior angle whose measure is equal to one-half the measure of its intercepted arc. Since the intercepted arc LN is the diameter of the circle, its measure is 180 degrees, so m<LMN = 90.

Simplifying

4(x + 2) = 28

Reorder the terms:

4(2 + x) = 28

(2 * 4 + x * 4) = 28

(8 + 4x) = 28

Solving

8 + 4x = 28

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-8' to each side of the equation.

8 + -8 + 4x = 28 + -8

Combine like terms: 8 + -8 = 0

0 + 4x = 28 + -8

4x = 28 + -8

Combine like terms: 28 + -8 = 20

4x = 20

Divide each side by '4'.

x = 5

Simplifying

x = 5

Simplifying

2(x + 4) = 28

Reorder the terms:

2(4 + x) = 28

(4 * 2 + x * 2) = 28

(8 + 2x) = 28

Solving

8 + 2x = 28

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-8' to each side of the equation.

8 + -8 + 2x = 28 + -8

Combine like terms: 8 + -8 = 0

0 + 2x = 28 + -8

2x = 28 + -8

Combine like terms: 28 + -8 = 20

2x = 20

Divide each side by '2'.

x = 10

Simplifying

x = 10

Answer:

±3

Step-by-step explanation:

x² = 9

Taking square root on both sides,

x = 3

Answer: one real solution

Step-by-step explanation:

Step-by-step explanation:

the discriminant of an equation, ax^2 + bx + c= 0 is

b^2 - 4ac

if b^2 - 4ac = 0

the equation will have equal roots therby being perfect

conclusion:

if the discriminant of an equation is zero

Answer:

BCF = 140°

See attached image.

Answer:

m<BCF=140°

Step-by-step explanation:

first find m<BCD

m<BCD=180-50-90

m<BCD=40°.

to find m<BCF, we can do 180-m<BCD, since m<BCD and m<BCF add up to 180° (they form a straight angle)

180-m<BCD=m<BCF

180-40=m<BCF

m<BCF=140°

Answer:

44 feet

Step-by-step explanation:

15 + 15 + 7 + 7 = 44

We can take all 4 sides and add them together to find the perimeter (aka how much fencing you need)

hope this helps :)

Answer:

Step-by-step explain to solve for the maximum area, the first derivative should be solved and equate it to zero, then solve for x.

A = 37x - x^2

dA / dx = 37 - 2x

equate dA / dx = 0

0 = 37 - 2x

2x = 37

x = 37 / 2

x = 18.5 ft

so the maximum area is  

A = 37x - x^2

A = 37( 18.5) - 18.5^2

A = 342.25 sq ft

so the answer is letter B

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Answer:

15-6=9

3÷9=3

Step-by-step explanation:

so it is A because if you ever see that just subtract the one number in front of the equal sign then divide the number beside the x.

Answer:

246373737

Step-by-step explanation:

good luck

Answer:

x=12

Step-by-step explanation:

All of the arcs have central angles.

Since an arc's central angle measure equal the arc measure,

A circle measures 360 degrees so all the arcs added up will equal 360

[tex]10x + x + 61 + x + 63 + x + 80 = 360[/tex]

[tex]13x + 204 = 360[/tex]

[tex]13x = 156[/tex]

[tex]x = 12[/tex]

Answer:

The answer is B

Because the train will stop and speed decreases with increasing time

Answer:

Step-by-step explanation:

The central angle is twice the inscribed angle (same arc).

The inscribed angle forms a supplementary angle with the missing one (opposite angles of the cyclic quadrilateral).

The missing angle is:

Answer:

(5,6)

Step-by-step explanation:

 Initial Coordinate   rotated 180°   is just a sign change    new coordinate

coordinate (x, y)       rotated 180°   is just a sign change     (-x, -y)

if                 (-x, y)      rotated 180°   is just a sign change     (x, -y)

if                 (x, -y)      rotated 180°   is just a sign change     (-x, y)

if                 (-x, -y)      rotated 180°   is just a sign change    (x, y)

Answer:

Step-by-step explanation:

1) 10:18=5:9

2) 15:21=5:7

3) 10:100=20:200

4) 12:28=3:7

5) 48:54=8:9

6) 36:75=12:25

7) 56:120=3.733:8

8) 18:24=6:8

9) 2:4=1:2

10) 45:60=15:20

11) 45:65=9:13

12) 180:210=30:35

13) 63:72=7:8

14) 48:72=4:6

15) 60:100=6:10

16) 36:108=6:18

17) 3:9=1:3

18) 72:180=8:20

19) 81:126=9:14

20) 22:33=2:3

Answer:

1. 15 :21=5:7

2. 10:100=20:200

3. 12:28=3:7

4. 48:54=8:9

5. 36:75=12:25

6. 56:120=3.73..:8

7. 2:4=1:2

8. 45:60=15:20

9. 45:65=9:13

10. 180:210=30:35

11. 63:72=7:8

12. 48:72=4:6

13. 60:100=6:10

14. 36:108=6:18

15. 3:9=1:3

16. 72:180=8:20

17. 81:126=9:14

18. 22:33=2:3

Answer: 3

Step-by-step explanation:

Answer:

the answer is 3

Step-by-step explanation:

Answer:

143ft

Step-by-step explanation:

12in is 1 foot and 13x11 (11x13) is 143

Answer:

the value of x=69 ft approx.

Answer:

[tex]\Large \boxed{\sf 69.02 \ ft}[/tex]

Step-by-step explanation:

Solve for w  using Pythagorean Theorem

[tex]\displaystyle w=\sqrt{77^2-22^2} =33\sqrt{5}[/tex]

Solve for z  using Pythagorean Theorem

[tex]\displaystyle z=\sqrt{(87.5)^2-(33\sqrt{5} )^2} = 47.02[/tex]

Find value of x

[tex]x=VY+YK[/tex]

[tex]22+47.02=69.02[/tex]

Answer:

Then find the product of the common prime factors. 42 = 2 ⋅3 ⋅7. 70 = 2 ⋅5 ⋅7 ... 6d2 − 21d. 27. 3y3 − 9y2. 28. 20x3 + 30x2. 29.

Answer:

the answer is D : 1/2 :))))))