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statuscvo [17]
3 years ago
8

On a test, Andre gets 4 times as many answers correct as he gets wrong. Write the ratio of questions he gets correct to the tota

l number of questions.
Mathematics
2 answers:
STALIN [3.7K]3 years ago
5 0

Answer:

4:5

Step-by-step explanation:


NemiM [27]3 years ago
3 0
I think it's 1:4 since if he gets two wrong than two times four is eight .
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2 sine squared theta plus sine theta minus 1 equals 02sin2θ+sinθ−1=0
frutty [35]
I did not even understand that equation
4 0
3 years ago
2x^2-3x-9 please help
Romashka-Z-Leto [24]
Im assuming you mean 2x^2-3x-9=0 ?
If so, you have to factorise the equation
(2x-3) (x+3) = 0

2x - 3 = 0
2x = 3
x = 1.5

x + 3 = 0
x = -3

x is either 1.5 or -3

8 0
3 years ago
Read 2 more answers
Find the value of x if y =1/4x and 5x-8y=33​
Verdich [7]

Answer:

x=11

Step-by-step explanation:

y= 1/4x

5x-8y=33

5x-8(1/4x)=33

x=11

8 0
3 years ago
5. Katie makes and sells scarves. Her monthly profit is given by P(s) = -s2 + 25s - 100, where "s" is the selling price. For wha
Marat540 [252]

Answer: s > 5

Step-by-step explanation:

-s² + 25s - 100 > 0

Coefficient of s² is -1, multiply the equation through by -1.

-1 × (-s² + 25s - 100)

s² — 25s + 100

ax² + bx + c

Then you get the factors x and y that gives x + y = b and xy = c

b = -25 and c = 100, x = -20 and y = -5

-20 × -5 = 100 and -20 + -5 = -25

Then

s² — 20s — 5s + 100 > 0

Factorising,

s (s — 20) — 5(s — 20) > 0

(s — 5)(s — 20) > 0

(s — 5) > 0 and (s — 20) > 0

s>5 and s>20

s > 5

Hope this Helps?

4 0
3 years ago
Rewrite 7+ square root-121 in complex number notation
marin [14]

7 + \sqrt{-121} = 7 + 11i because we define \sqrt{-1} = i

6 0
3 years ago
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