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Nata [24]
3 years ago
8

How many questions need to be answered correctly to receive a score of 80%?dhow your work

Mathematics
1 answer:
dangina [55]3 years ago
6 0
It depends on how many questions there are
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Sal is making bracelets for a fundraiser he uses 6 inches of yarn per bracelet how many bracelets can sal make with 5 feet of ya
4vir4ik [10]

Answer:

10

Step-by-step explanation:

12×5 = 60 in of yarn

60÷6 =10 bracelets

7 0
3 years ago
Select the correct answer.
VLD [36.1K]

Answer:

I think the answer is B

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Mr. Markwood's dog Burke has $1.40 in his doggie
bulgar [2K]

answer:

$6.65

Step-by-step explanation:

He would earn 21 quarters in 3 weeks.

Because there are 7 days in a week: Multiply 7×3=21

21 quaters in dollars is equal to $5.25

So you add $1.40+$5.25=$6.65

3 0
3 years ago
What is the value of c such that the line y=2x+3 is tangent to the parabola y=cx^2
satela [25.4K]

The value of c such that the line y = 2\cdot x + 3 is tangent to the parabola y = c\cdot x^{2} is -\frac{1}{3}.

If y = 2\cdot x + 3 is a line <em>tangent</em> to the parabola y = c\cdot x^{2}, then we must observe the following condition, that is, the slope of the line is equal to the <em>first</em> derivative of the parabola:

2\cdot c \cdot x = 2 (1)

Then, we have the following system of equations:

y = 2\cdot x + 3 (1)

y = c\cdot x^{2} (2)

c\cdot x = 1 (3)

Whose solution is shown below:

By (3):

c =\frac{1}{x}

(3) in (2):

y = x (4)

(4) in (1):

y = -3

x = -3

c = -\frac{1}{3}

The value of c such that the line y = 2\cdot x + 3 is tangent to the parabola y = c\cdot x^{2} is -\frac{1}{3}.

We kindly invite to check this question on tangent lines: brainly.com/question/13424370

3 0
2 years ago
When you buy the bond the exchange rate is ​$1.50 ​= pound1. You pay pound45 ​($67.50​) for the British bond. You sell the bond
natka813 [3]

Answer:

The gain is of $17.50

Step-by-step explanation:

When you buy the bond the exchange rate is ​$1.50 ​= £1.

You pay £45 = 1.50\times45=​$67.50 for the British bond.

No, you sell the bond for £50 and the exchange rate is​ $1.70 ​= £1.

So, you earned 50\times1.70=85 dollars

Your gain is 85-67.50 = $17.50

3 0
3 years ago
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