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3 years ago

Evaluate g(-4) when g(b) = - 4(12.5b - 2) Can someone help please?

Mathematics

1 answer:

Stolb23 [73]3 years ago

3 0

The answer to your problem is 50b+8

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for a class of 24,78% of students got a B or better on the tex How many students is this? Round to a wholenumber

natita [175]

Step 1

Use the ratio of the number to the percentage to get the required answer.

$\frac{Total\text{ number of students}}{\text{The required number of students}}=\frac{Total\text{ percentage of the class}}{\text{Given percentage}}$

Where,

$\begin{gathered} \text{The total number of students = 24} \\ \text{The required number }of\text{ students= x} \\ \text{The total percentage of the class = 100} \\ \text{Given percentage = 78} \end{gathered}$

Step 2

Get the required answer

$\begin{gathered} \frac{24}{x}=\frac{100}{78} \\ 100x=24\times78 \\ 100x=1872 \\ \frac{100x}{100}=\frac{1872}{100} \\ x=\text{ 18.72} \\ \text{Hence} \\ x\approx19students\text{ rounded to a whole number } \end{gathered}$

The number of students that got B or a better grade on the test = 19 students rounded to a whole number.

4 0

11 months ago

Multiply Conjugates (r+1/4)r-1/4)

Mamont248 [21]

Answer:

$\large\boxed{\left(r+\dfrac{1}{4}\right)\left(r-\dfrac{1}{4}\right)=r^2-\dfrac{1}{16}}$

Step-by-step explanation:

$\text{Use}\ (a+b)(a-b)=a^2-b^2\\\\\left(r+\dfrac{1}{4}\right)\left(r-\dfrac{1}{4}\right)=r^2-\left(\dfrac{1}{4}\right)^2=r^2-\dfrac{1^2}{4^2}=r^2-\dfrac{1}{16}$

8 0

3 years ago

Read 2 more answers

Can someone make my day and please help me solve number 3?

olga nikolaevna [1]

X = cost of car before tax

Total cost = (cost of car before tax) + (tax amount)
Total cost = x + 5% of x
Total cost = x + 0.05x
Total cost = 1.05x

The total cost is given to be $14,512, which means

Total cost = 1.05x = 14512

1.05x = 14512
1.05x/1.05 = 14512/1.05
x = 13,820.95238
x = 13,820.95

The total cost of the car before tax, to the nearest cent, is $13,820.95

6 0

2 years ago

Which expression is equivalent to 7 (x + 4)?

aalyn [17]

Answer:

7 times 5x

Step-by-step explanation:

4 plus x and x has value

3 0

2 years ago

Read 2 more answers

PLEASEEEEEEEEEEEEEEEEEE HELP!!!!!!!!!

rewona [7]

Answer:

12 Squared Units

Step-by-step explanation:

Top length: 4 Units

Side length: 3 Units

5 0

2 years ago