All categories

3 years ago

John's grades in Algebra are: 65, 83, and 93. What grade does John need on the final exam to get an 85

Mathematics

1 answer:

hoa [83]3 years ago

8 0

Answer:

99 marks

Step-by-step explanation:

Let 'x' be the mark in final exam

Sum of all the data's/ Number of data's = Mean

$\frac{65+83+93+x}{4}=85\\\\\\\frac{241+x}{4} = 85$

241 + x = 85*4

241 + x = 340

x = 340 - 241

x = 99

You might be interested in

Please help thanks in advance also best answer get's brainlest

Neko [114]

Answer:

angle t is 55 degrees

Step-by-step explanation:

Here's my work:

Isoscelese means two of the same length sides. A triangle is 180 degrees. 180-70=110

110/2=55 (two because those are the two angles associated with the equal sides)

5 0

2 years ago

1-(-4) ,, (-4) is squared outside the parentheses

Naddika [18.5K]

1-(-4)^2
1-(-4 times -4)
1-(16)
1-16
-15

5 0

3 years ago

Substation method x-2y=5 ,<br> 3x-5y=8

valina [46]

$x-2y=5 \\
3x-5y=8 \\ \\
\hbox{solve the first equation for x:} \\
x-2y=5 \ \ \ |+2y \\
x=2y+5 \\ \\
\hbox{substitute 2y+5 for x in the second equation:} \\
3(2y+5)-5y=8 \\
6y+15-5y=8 \\
y+15=8 \ \ \ |-15 \\
y=-7 \\ \\
x=2y+5=2 \times (-7)+5=-14+5=-9 \\ \\
\boxed{(x,y)=(-9,-7)}$

6 0

3 years ago

Given that f(x) = 5x^2-3x+7 and f(g(x))=(5x^4)/9 + (17x^2)/3 + 21. Find all possible values for the sum of the coefficients in t

shtirl [24]

steps

(x) = 5x^2-3x+7

refine

x=5x^2-3x+7

Switch sides

5x^2-3x+7-x=x-x

Subtract x from both sides

5x^2-4x+7=0

Solve with the quadratic formula

8 0

3 years ago

Math assignment I need help ASAP

sweet-ann [11.9K]

Answer:

Option B: -4 - 15x - 10 + 4x = -45

Step-by-step explanation:

The second step of the equation is to distribute 5 to the numbers in the parenthesis

6 0

3 years ago