Ask question

Ask question

All categories

3 years ago

8

Isabel bought some books for $6 each and received a discount of $8 off of her total purchase. She spent $58 after the discount.

How many books did she buy?

1 answer:

Art [367]3 years ago

8 0

Answer:

11

Step-by-step explanation:

You might be interested in

20. A ball is dropped from a height of a little over 5 feet, and the height is measured at small intervals. The table below show

nekit [7.7K]

Step 1:

a) Write the quadratic model

a = -15.64

b = -1.24

c = 5.23

$P(t)=-15.64t^2\text{ - 1.24t + 5.2}3$

b) t = 0.30

$\begin{gathered} P(t)=-15.64t^2\text{ - 1.24t + 5.2}3 \\ =\text{ -15.64 }\times0.3^2\text{ - 1.24}\times\text{ 0.3 + 5.2}3 \\ =\text{ -1.4076 - 0.372 + }5.23 \\ =\text{ 3.45} \end{gathered}$

c) t = 0.52 seconds

$\begin{gathered} p(t)=-15.64t^2\text{ - 1.23t + 5.23} \\ =\text{ -15.64}\times0.52^2\text{ - 1.23}\times0.52\text{ + 5.23} \\ =\text{ -4.23 - 0.64 + 5.23} \\ =\text{ 0.36} \end{gathered}$

d) 0.30 is more likely to be relaible.

e)

$\begin{gathered} p(t)\text{ = 1} \\ p(t)=-15.64t^2\text{ - 1.23t + 5.23} \\ 1=-15.64t^2\text{ - 1.23t + 5.23} \\ -15.64t^2\text{ - 1.23t + 4.23 = 0} \\ t\text{ = 0.48222} \\ \text{t = 0.48 seconds} \end{gathered}$

5 0

1 year ago

Which of the following relations is a function?

Agata [3.3K]

Answer:

D

Step-by-step explanation:

Because in D, there no x-value that are repeating in the list.

For example A, the value 8 and -8 are being repeated twice, which makes this relation not a fuction.

5 0

3 years ago

Ello ... Random Question

BARSIC [14]

Hi i know the answrrrrr

7 0

3 years ago

Read 2 more answers

A science class has 3 girls and 7 boys in the seventh grade and 4 girls and 4 boys in the eighth grade. The teacher randomly sel

Gala2k [10]

Answer:

I think it is a

Step-by-step explanation:

3 0

3 years ago

If 37% of high school students said that the excercise regularly, find the

katrin [286]

Answer: 0.6934%

Step-by-step explanation:

Probability is the branch of mathematics that is concerned with the numerical descriptions of how likely an event will occur or how likely a proposition is true

If 37% of high school students said that the exercise regularly, the

probability that 5 students who are randomly selected will say thay they exercise regularly will be:

= (37/100)^5=0.006934

= 0.6934%

6 0

3 years ago