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poizon [28]
2 years ago
10

A multiple choice test consists of 100 questions. A correct answer is worth 2 marks, while an incorrect answer is worth -1 marks

. If a student receives a score of 89, how many questions did this student answer in correctly
Mathematics
1 answer:
Papessa [141]2 years ago
5 0

Answer:the answer is 44.50

Step-by-step explanation:

since the right answer worth more than the wrong then you have to put 89 divide by 2 because two is how much point the correct answer worth.

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Question 2: Please help I do not understand this question.
Svetradugi [14.3K]

The measurement of AB is 16.23.

Solution:

Given ACB is a right angled triangle.

AC = 10, ∠C = 90° and ∠A = 52°.

cos θ ≈ 0.616

Here AC is the base and AB is Hypotenuse.

To find the length of AB:

$\cos\theta=\frac{\text{Base}}{\text{Hypotenuse}}

$\cos 52^\circ=\frac{10}{AB}

$0.616=\frac{10}{AB}

Do cross multiplication, we get

$AB=\frac{10}{0.616}

AB = 16.23

Hence the measurement of AB is 16.23.

5 0
3 years ago
using my tap it takes 6 minutes to fill our water tank usig my neighbours hose it takes 9 minutes how long would it take if i us
Karolina [17]

Answer:

7 minutes and 30 seconds

Step-by-step explanation:

it's the middle of 6 and 9

5 0
3 years ago
Can someone help me with my algebra?
SIZIF [17.4K]

Answer:

The top graph

Solutions:

-2

0

Step-by-step explanation:

The given quadratic function in factored form is

f(x) =  - (x + 2)(x - 2)

This is a parabola that has x-intercepts at (-2,0) and (2,0)

This parabola opens downward because the leading coefficient is less than 1.

The second function is

g(x) = 2 |x  + 2|

This is an absolute value function with vertex at (-2,0).

Therefore the graph that shows the solution to f(x)=g(x) is the top graph.

Hence the solution is x=-2,x=0

4 0
3 years ago
Jenny earned a 77 on her most recent test. Jenny’s score is no less than 5 points greater than Four-fifths of Terrance’s score.
Nina [5.8K]

Answer:

Its A

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
g At a certain gas station, 30% of all customers use the restroom. What is the probability that, out of the next 10 customers, (
Kruka [31]

Answer:

P(x=4) = 0.200

Step-by-step explanation:

Given

n=10 --- selected customers

x = 4 --- those that are expected to use the restroom

p =30\% = 0.30 --- proportion that uses the restroom

Required

P(x = 4)

The question illustrates binomial probability and the formula is:

P(x) = ^nC_x * p^x * (1 - p)^{n - x}

So, we have:

P(x=4) = ^{10}C_4 * (0.30)^4 * (1 - 0.30)^{10 - 4}

P(x=4) = ^{10}C_4 * (0.30)^4 * (0.70)^6

P(x=4) = 210* (0.30)^4 * (0.70)^6

P(x=4) = 0.200

4 0
3 years ago
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