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r-ruslan [8.4K]
3 years ago
8

Can someone please help

Mathematics
2 answers:
Nata [24]3 years ago
5 0
F(x)= x^2-3x+4
f(-2)= (-2)^2 - 3(-2) + 4
= 4+6+4
=14
klemol [59]3 years ago
4 0
You just plug in the -2 for x to get the equation -2^2–3•-2+4= 6
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The ratio of boys to girls in Fiona's class is
CaHeK987 [17]

Ratio of boys to girls = 1 : 3

Unknown constant = x

x + 3x = 24

4x = 24

x = 6

No. of girls = 3 x 6 = 18

5 0
3 years ago
a student earns 42 points out of 60 points on a test what percent of the points did the student answer​
pochemuha

Answer:

It would be a 70%

Step-by-step explanation:

Convert fraction (ratio) 42 / 60 Answer: 70%

6 0
3 years ago
Read 2 more answers
Starter
4vir4ik [10]

Answer:

1) £2 = €2.32

£5 = €5.80

£50 = €58

2) The graph will be a straight line

3) (0, 0)

4) Label the independent variable, £ on the x-axis and dependent variable € on the y-axis

Step-by-step explanation:

1) The given conversion factors is £1 = €1.16

Therefore;

£2 = 2 × €1.16 = €2.32

£2 = €2.32

£5 = 5 × €1.16 = €5.80

£5 = €5.80

£50 = 50 × €1.16 = €58

£50 = €58

2) The shape of the plot of the directly proportional currencies graph will be a straight line

3) Given that the £ is directly proportional to the € and that the value of the € can be found directly by multiplying the amount in £ by 1.16, without the addition of a constant, the graph crosses the axes at the origin (0, 0)

4) The y-axes which is the dependent variable should be labelled €, while the x-axis which is the independent variable should be labelled £

4 0
2 years ago
What was the original price if: after 10% discount it becomes $450?
steposvetlana [31]
100-10=90

450=90% of original find 100%
divide by 9
50=10%
times 10
500=100%
origianl price=$500 (this is the hack way that only works with nice numbers)
7 0
3 years ago
Read 2 more answers
Find the volume to the nearest cm3<br> 20 cm<br> 35 cm<br> 12 cm
riadik2000 [5.3K]
Answer: 10380cm^3

Explanation:

Find the volume of half cylinder:

V = (pi x r^2 x h)/2 (I use pi = 22/7 for simplifying)
V = 22/7 x 6^2/2 x 35
V = 22/7 x 36/2 x 35
V = 22/7 x 35 x 18
V = 22 x 5 x 18
V = 1980cm^3

Find the volume of the rectangle:

V = 20 x 35 x 12
V = 240 x 5 x 7
V = 1200 x 7
V = 8400cm^3

Find the volume of the whole shape:

V = 1980 + 8400
V = 10380cm^3

3 0
2 years ago
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