Ask question

Ask question

All categories

3 years ago

13

Blake has b baseball cards. His aunt gave him more cards, increasing his total number of cards by 25%. Which expression represen

ts Blake’s total number of cards now? A. b + 0.25 B. b − 0.75b C. 1.25b D. 0.75b

2 answers:

Trava [24]3 years ago

7 0

Answer: C. 1.25b

Step-by-step explanation:

Given : Blake has b baseball cards.

His aunt gave him more cards, increasing his total number of cards by 25%.

We can write 25% as 0.25.

Now, 25% of baseball cards will be : 0.25 x b= 0.25b

Now, the expression represents Blake’s total number of cards now :

b+0.25b= (1+0.25)b [t by distributive property ba+ca=(b+c)a]

=1.25b

Hence, the correct expression represents Blake’s total number of cards :

1.25 b

Iteru [2.4K]3 years ago

3 0

The answer is A because we dont know how many baseball cards blake had so you would add .25 to b

You might be interested in

The paint mixer wants to mix paint that is 30% gloss with paint that is 15% gloss to make 3.75 gallons of paint that is 20% glos

Kipish [7]

The paint mixer should mix 1.238 gallon paint that is 30 % gloss and 2.512 gallon paint that is 15 % gloss to get 3.75 gallon of paint that is 20 % gloss.

In this question we must determine the correct volumes of each paint to obtain a 20 % gloss with paint by means of weighted averages:

$c_{r} = x\cdot c_{a} +(1-x)\cdot c_{b}$ (1)

Where:

$x$ - Proportion of the paint that is 30 % gloss.
$c_{a}$ - Concentration ratio of the paint that is 30 % gloss.
$c_{b}$ - Concentration ratio of the paint that is 15 % gloss.
$c_{r}$ - Resulting concentration ratio

If we know that $c_{a} = 0.3$ , $c_{b} = 0.15$ and $c_{r} = 0.2$ , then the proportion of the paint that is 30 % gloss is:

$0.2 = 0.3\cdot x +(1-x)\cdot 0.15$

$0.2 = 0.15\cdot x+0.15$

$0.15\cdot x = 0.05$

$x = 0.33$

And the quantity of gallons needed of each paint are:

Paint (30 % gloss)

$V_{a} = 0.33\cdot (3.75\,gal)$

$V_{a} = 1.238\,gal$

Paint (15 % gloss)

$V_{b} = V-V_{a}$

$V_{b} = 3.75\,gal-1.238\,gal$

$V_{b} = 2..512\,gal$

The paint mixer should mix 1.238 gallon paint that is 30 % gloss and 2.512 gallon paint that is 15 % gloss to get 3.75 gallon of paint that is 20 % gloss.

To learn more on weighted averages, we kindly invite to check this question: brainly.com/question/18554478

8 0

2 years ago

Using a calculator, work out:<br> V2704 x 22 - 149

goldfiish [28.3K]

whattt?.............

7 0

3 years ago

Help I don’t know what I’m doing

Jlenok [28]

Your slope is 6/4. I found this by locating two points where the line intercepts evenly at two points. One was on the y-axis(0,-3) and the other was at (5,3). I then calculated the slope- rise over run or y over x. Because this graphs in a straight line, it is a linear equation. Your equation formula is y = mx + b. M is your slope, and b is your y-intercept. y = 6/4x -3

7 0

3 years ago

Estimate the answer. 98x72=

olga55 [171]

Answer:

The answer would be 7058

3 0

2 years ago

Read 2 more answers

You are researching the average emails received per day. You want to know how many employees you should survey if you want to kn

IrinaK [193]

Answer:

The value is $n =29 \ employees$

Step-by-step explanation:

Generally the number of employee to survey(sample size) is mathematically represented as

$n = [ \frac{z * \sigma }{E} ]^2$

Here E is the margin of error which is given as E = 47

So substituting 1.645 for z and 155 for $\sigma$

$n = [ \frac{1.645 * 155 }{47} ]^2$

=> $n =29 \ employees$

5 0

3 years ago