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denis23 [38]
3 years ago
14

Factor completely.

Mathematics
1 answer:
Marta_Voda [28]3 years ago
8 0
<span>x^2 - 3x - 28 = </span><span>(x - 7)(x + 4)

answer
first one
</span><span>(x - 7)(x + 4)
</span>
hope it helps
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The table gives the surface areas, in square kilometres, of five seas.
zlopas [31]

The table is missing, so i have attached it.

Also, the correct question is;

The surface area of the East China Sea is k times the surface area of the Baltic Sea.

Work out the value of k.

Give your answer to the nearest whole number

Answer:

k = 3

Step-by-step explanation:

From the attached table,

Surface area of east china = 1.25 × 10^(6) km²

Surface area of Baltic sea = 4.22 × 10^(5) km² = 0.422 × 10^(6) km²

We are told that the surface area of East China Sea is k times that of the surface area of the Baltic Sea.

Thus;

1.25 × 10^(6) = k × 0.422 × 10^(6)

k = 1.25/0.422

k = 2.96

Approximating to whole number gives;

k = 3

4 0
3 years ago
A= 1/2 h (m+n)<br> solve for n
melisa1 [442]

Answer:

2hms+2hns

Step-by-step explanation:

3 0
3 years ago
Jim ran 12 1/2 miles in 2 1/2 hours. How many hours for 1 mile?
Klio2033 [76]

Answer:

1/5 hours i.e 0.2 hours (which is 12 mins)

Step-by-step explanation:

First note that 12 1/2 = 12.5, and 2 1/2 = 2.5.

To work out how many hours it takes hime to drive one mile, we divide the number of hours (2.5) by the number of miles (12.5),

i.e 2.5 ÷ 12.5

which equals 1/5 = 0.2 hours (= 12 mins).

4 0
3 years ago
Find the value
Vaselesa [24]

Answer:

cosC = BC/AC

\cos(c)  =  \frac{15}{39}

4 0
3 years ago
Please helppp!!!! I’ll give you a crown!!
siniylev [52]

Answer:

the second one

Step-by-step explanation:

the last number of the equation (-3) is the y intercept, so it goes the the point (0,-3), also it has the opposite slope of y=2x-3

i hope this helps and im sorry if im wrong :(

8 0
3 years ago
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