Solve using the linear combination method (show work)<br> 4 − 9 = 1 <br> −4 + 6 = −2

Hira is rollerblading at 9 m/s. Danni is climbing at 7 m/s. Amelia is cartwheeling at 2 m/s.

anyanavicka [17]

Answer:

Hira

Step-by-step explanation:

They are going at the fastest speed as 9 is the most

5 0

3 years ago

Read 2 more answers

Can someone help me with number 10, 11, 12, 15, and 16 I don’t understand them thanks

yanalaym [24]

10)

$10^2-48:6+25*3=100-8+75=167$

11)

$8(\frac{16}{4} )+2^2-11*3=32+4-33=3$

12)

$(\frac{6}{3} +4)^2:4*7=(2+4)^2:4*7=6^2:4*7=36:4*7=9*7=63$

13) (your answer is incorrect)

$5(9-4)^2-3^2=5*5^2-3^2=5*25-9=125-9=116$

14) (your answer is incorrect)

$5^2-2^2*4^2-12=25-4*16-12=25-64-12=-51$

15)

$(\frac{50}{5^2} )^2:4=(\frac{50}{25} )^2:4=2^2:4=4:4=1$

16)

$\frac{24+32+30+28}{2}$ -expression to represent this situation

$\frac{24+32+30+28}{2}=\frac{114}{2}=57$

Answer: In 1 group 57 students

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P.S. Hello from Russia :^)

4 0

3 years ago

We need to attach a support wire to Glendale's flagpole, which is 24 feet high. The

antoniya [11.8K]

Step-by-step explanation:

this creates a right-angled triangle.

the right angle (90°) being the angle between flag pole and ground.

the angle ground-wire is 50°.

because we know that the sum of all angles in a triangle is always 180°, we know then that the angle flagpole-wire is

180 - 90 - 50 = 40°

so, we have the situation to know 1 side and all angles.

to get the other sides we use best the law of sine :

a/sin(A) = b/sin(B) = c/sin(C)

where the sides and related angles are always opposite of each other.

in our case now we have

24/sin(50) = wire/sin(90) = wire/1 = wire = 31.32977494... ft

so, the rounded answer is that the wire must be

31.3 ft long

4 0

3 years ago

How did they get -1 for -3(x-1)+3=9-2(x+1)

Ira Lisetskai [31]

Answer:

by answering hte questin

Step-by-step explanation:

3 0

3 years ago

A person is standing 50 ft from a statue. The person looks up at an angle of elevation of

Alekssandra [29.7K]

Answer:

The height of the statue is <u>21.4 feet.</u>

Step-by-step explanation:

Given:

Distance of the person from the statue = 50 ft

Angle of elevation of the top of statue = 16°

Angle of depression of the bottom of statue = 8°

The diagram is drawn below.

In triangle ABC:

BC = 50 ft, ∠ABC = 16°

Using trigonometric formula;

$\tan(16)=\frac{y}{50}$

$y=50\tan(16)$

$y=14.337\ ft$

Now, let us determine the height of man, 'x'.

Consider triangle BDE.

ED = 50 ft, ∠BDE = 8°

Using trigonometric formula;

$\tan(8)=\frac{x}{50}\\\\x=50\tan(8)\\\\x=7.027\ ft$

Now, from the diagram, it is clear that, height of statue is given as:

$H=x+y=14.337+7.027=21.36\ ft\approx=21.4\ ft(Nearest\ tenth)$

5 0

3 years ago

Solve using the linear combination method (show work) 4 − 9 = 1 −4 + 6 = −2