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3 years ago

I don’t understand this at all help please

Mathematics

1 answer:

Talja [164]3 years ago

5 0

Answer:

225 km^2

Step-by-step explanation:

Area of a trapezoid: ((Base 1 + Base 2) x h) / 2

(11 + 19) x 15 / 2

= 225 km^2

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A ladder is leaning against the side of a building. The bottom of the ladder makes an angle of 73 degrees with the ground and is

Darina [25.2K]

Answer:

3.08

Step-by-step explanation:

you are looking for the hypotenuse, and have adjacent. So, use COS.

cos(73)=0.9/x

simplified 0.9/cos(73)

calculate.

5 0

3 years ago

What is the 101st term for the sequence 13, 9, 5, 1... ?

NeX [460]

Step-by-step explanation:

a=13
d=13-9=4

${:}\longrightarrow$ $\sf S_n={\dfrac {n}{2}}\left [2a-(a-1)d\right]$

${:}\longrightarrow$ $\sf S_101={\dfrac {101}{2}}\left [26 (12)4\right]$

${:}\longrightarrow$ $\sf 50.5×1248$

${:}\longrightarrow$ $\sf S_101=63504$

${:}\longrightarrow$ $\sf a_n=a+(n-1)d$

${:}\longrightarrow$ $\sf a_101=13+(101-1)-4$

${:}\longrightarrow$ $\sf a_101=13+100(-4)$

${:}\longrightarrow$ $\sf 13-400$

${:}\longrightarrow$ $\sf a_101=-387$

8 0

3 years ago

Evaluate each expression if x = 5<br><br> 7x

Vladimir79 [104]

Answer:

=7x

Now,

Putting the value of x= 5 then we get,

=7×5

=35

Hope this helps u

3 0

4 years ago

Read 2 more answers

Solve the linear systems by graphing.

Colt1911 [192]

Answer:

Step-by-stepexplanation:

5 0

3 years ago

Given cscx =-5/2 between 270 and 360 find sin2x

ICE Princess25 [194]

Hello :
cscx = -5/2
1/sinx =-5/2
sinx=-2/5
sin²x+cos²x=1
4/25+cos²x=25/25
cos²x = 21/25
between 270 and 360 : cosx > 0 cosx=(<span>√21)/5
but : sin2x =2sinx cosx
sin2x = 2(-2/5)(</span>(√21)/5)
sin2x = (-4√21)/25

3 0

3 years ago