1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
igor_vitrenko [27]
3 years ago
8

.A student earned 75 out of 100 in Col110 quiz for the first time, then she earned 85 out of 100 in the second time for the same

quiz, what was the percentage change(increase or decrease) in her grade? Round your answer nearest to hundredth
Mathematics
1 answer:
saveliy_v [14]3 years ago
3 0

Answer: increase

Step-by-step explanation:

You might be interested in
. Use the quadratic formula to solve each quadratic real equation. Round
Liono4ka [1.6K]

Answer:

A. No real solution

B. 5 and -1.5

C. 5.5

Step-by-step explanation:

The quadratic formula is:

\begin{array}{*{20}c} {\frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}} \end{array}, with a being the x² term, b being the x term, and c being the constant.

Let's solve for a.

\begin{array}{*{20}c} {\frac{{ 5 \pm \sqrt {5^2 - 4\cdot1\cdot11} }}{{2\cdot1}}} \end{array}

\begin{array}{*{20}c} {\frac{{ 5 \pm \sqrt {25 - 44} }}{{2}}} \end{array}

\begin{array}{*{20}c} {\frac{{ 5 \pm \sqrt {-19} }}{{2}}} \end{array}

We can't take the square root of a negative number, so A has no real solution.

Let's do B now.

\begin{array}{*{20}c} {\frac{{ 7 \pm \sqrt {7^2 - 4\cdot-2\cdot15} }}{{2\cdot-2}}} \end{array}

\begin{array}{*{20}c} {\frac{{ 7 \pm \sqrt {49 + 120} }}{{-4}}} \end{array}

\begin{array}{*{20}c} {\frac{{ 7 \pm \sqrt {169} }}{{-4}}} \end{array}

\begin{array}{*{20}c} {\frac{{ 7 \pm 13 }}{{-4}}} \end{array}

\frac{7+13}{4} = 5\\\frac{7-13}{4}=-1.5

So B has two solutions of 5 and -1.5.

Now to C!

\begin{array}{*{20}c} {\frac{{ -(-44) \pm \sqrt {-44^2 - 4\cdot4\cdot121} }}{{2\cdot4}}} \end{array}

\begin{array}{*{20}c} {\frac{{ 44 \pm \sqrt {1936 - 1936} }}{{8}}} \end{array}

\begin{array}{*{20}c} {\frac{{ 44 \pm 0}}{{8}}} \end{array}

\frac{44}{8} = 5.5

So c has one solution: 5.5

Hope this helped (and I'm sorry I'm late!)

4 0
3 years ago
2% of what amount is $200? Show work!
rewona [7]
.02 of x = 200
.02x = 200
divide both sides by .02
x = 10000
200 is 2% of 10,000

Your answer: 10,000

Hope this helped! :)
4 0
4 years ago
Find the measure of the arc
taurus [48]

Answer:

B

Step-by-step explanation:

The measure of the arc is equal to the central abgle it subtends, thus

arc = 65°

7 0
3 years ago
Can someone tell me which one is the answer and why?​
Ad libitum [116K]

Answer:

i want to say that the answer is D but in reality you cant have a negative number in the square root and then take it out unless is tied to the exponent, but the most likey answer would be D since there are no other answer choices

4 0
3 years ago
Select all choices that describe rectangles with same area that are NOT congruent.
pickupchik [31]
B,E,F sorry if I’m wrong
6 0
3 years ago
Read 2 more answers
Other questions:
  • Willow poured the same amount of water into 88 flower pots. She used 55 gallons of water. How much water did each flower get?
    15·1 answer
  • Solve the system by the elimination method. -2x + y + 6 = 0 2x + y - 8 = 0 When you eliminate x, what is the resulting equation?
    12·2 answers
  • What is 4.583.269 rounded to the nearest hundredth
    15·1 answer
  • Mrs gray bought some eggs. She boiled one half of them and poached one fourth of the remainder . she had 9 eggs left. How many e
    9·1 answer
  • What is the result if you divide 18r4 s5 t6 / -3 r2 st3 ?
    6·2 answers
  • 6x - 5 = -47 helpppp
    13·2 answers
  • Can anyone help me solve this
    9·1 answer
  • What if a graph showed acceleration rather than speed? Where would the line be when the car was continuing at a constant speed o
    11·1 answer
  • . If n(A)=2 n(B)=3 n(AՈB) =24, what is the value of n(AUB)?​
    5·1 answer
  • What is the length of the indicated side?<br><br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!