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PIT_PIT [208]
3 years ago
9

I need help in question 16

Mathematics
1 answer:
zalisa [80]3 years ago
5 0

Answer:i cant see the whole answer.

Step-by-step explanation:

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Which of the following are solutions to the equation below?
inysia [295]

The answer is C and D

First we must make one side of the equation zero, so we subtract 7 on both sides of the equation, making the equation 9x^2 - 6x - 6 = 0

Then we will use the quadratic formula to find the answers.

using the Quadratic Formula where:

a = 9, b = -6, and c = -6

and the formula is 6 +- \sqrt{6^{2} } -4 (9)(6) /2 (9)

6 0
3 years ago
It is a week before the maths festival. A maths exhibitor costs £75.40 and so far 12 have been bought.
Tasya [4]

Answer:

Hello,

£75.40*12= 904.8£


Step-by-step explanation:


5 0
3 years ago
2cos<img src="https://tex.z-dn.net/?f=2cos%5E%7B2%7D%20x-3cosx%2B1%3D0" id="TexFormula1" title="2cos^{2} x-3cosx+1=0" alt="2cos^
sattari [20]

Answer:

34

Step-by-step explanation:

7 0
3 years ago
If f(x) varies directly with x and f(x) = 4 when x = 12, then what is the value of f(x) when x = 60?
ANTONII [103]
ANSWER

f(60)=3\times60=180

EXPLANATION
We were given that
f(x)
varies directly as
x.

We can write this mathematically as,

f(x) \propto \: x.

This implies that,

f(x) = kx
where k is the constant of variation.

f(4)=4k

This implies that,

4k=12

k = 3

The equation becomes

f(x)=3x

When x=60

f(60)=3\times60=180
6 0
4 years ago
72 is 45% of what number? Please give me a explanation with the answer asap
Juliette [100K]

Answer:

160

Step-by-step explanation:

72/45 = 1.6

1.6 * 45 = 72

Background information

160/100 = 1.6 (100 for percents)

160 fits the answer so it is right

HOPE THIS HELPS

PLZZ MARK BRAINLIEST

5 0
3 years ago
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