All categories

3 years ago

Corey average score after each test is 91% if he gets 78% on his next test what will his new average be

Mathematics

1 answer:

Marianna [84]3 years ago

3 0

Your answer is 89.56 hope this helps and God bless you

You might be interested in

Answer this question

cestrela7 [59]

Answer: a.) (3x +1)(2x +3)

Step-by-step explanation:

The factors that work to get the middle term, 11x, are 3×3x = 9x and 1×2x=2x. 2x +9x = 11x

3 0

3 years ago

What is the solution to -x2 + 5x - 3

CaHeK987 [17]

The solution to the equation is $x=\frac{5-\sqrt{13}}{2}$ and $x=\frac{5+\sqrt{13}}{2}$

Explanation:

Given that the equation is $-x^2+5x-3=0$

We need to determine the solution of the equation.

The solution of the equation can be determined using the quadratic formula.

The quadratic formula is given by

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Hence, from the equation, we have,

$a=-1,\:b=5,\:c=-3$

Substituting these values in the quadratic formula, we get,

$x=\frac{-5\pm \sqrt{5^2-4\left(-1\right)\left(-3\right)}}{2\left(-1\right)}$

Simplifying, we get,

$x=\frac{-5\pm \sqrt{25-12}}{-2}$

Simplifying the terms within the root, we get,

$x=\frac{-5\pm \sqrt{13}}{-2}$

Thus, the roots of the equation are $x=\frac{-5+ \sqrt{13}}{-2}$ and $x=\frac{-5- \sqrt{13}}{-2}$

Taking out the negative sign, we get,

$x=\frac{-(5- \sqrt{13})}{-2}$ and $x=\frac{-(5+ \sqrt{13})}{-2}$

Cancelling the negative sign, we get,

$x=\frac{5-\sqrt{13}}{2}$ and $x=\frac{5+\sqrt{13}}{2}$

Thus, the solutions of the equation are $x=\frac{5-\sqrt{13}}{2}$ and $x=\frac{5+\sqrt{13}}{2}$

7 0

4 years ago

2 If m please help me

Nadusha1986 [10]

Answer:

x = 18

m∠HCB = 36

Step-by-step explanation:

The measure of angle FBC is 8x and the measure of angle HCB is 2x. If you add the measures of both angles it will equal to 180 degrees. This can be represented in an equation:

8x + 2x = 180

10x = 180

Divide both sides of the equation by 10 to isolate the x:

10x/10 = 180/10

x = 18

Now that we know the value of x, we can find the measure of angle HCB:

2(18)

The measure of angle HCB is 36.

I hope this helps :)

8 0

3 years ago

A cashier of a certain company is paid Php 550 per day for an 8-hour shift. Each

Vera_Pavlovna [14]

Answer:

Php 3,230

Step-by-step explanation:

1. calculate x= the number of days worked in a week (5days)

which is,

x= 5 (no of days) x 550 ( total amount of Php received in a day)

x= Php 2,750

2. calculate y= the number of extra hours ( 6 hours )

which is,

y= 6 ( total number of extra hours ) x 80 ( because extra hours is paid at the amount of Php 80 )

y= Php 480

3. Add x and y to get the final answer

which is,

Php 2,750 + Php 480 = Php 3,230

3 0

3 years ago

A jar contains 5 black and 9 white marbles priscilla draws a marble from the jar what is the probability that she drew a black m

Vanyuwa [196]

The probability of the black marble will be 35.7% because 100/(9+5) is 7.14 and you multiply that by 5 to get 35.7%.

5 0

3 years ago

Read 2 more answers