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3 years ago

Math is boring/need help pls

Mathematics

2 answers:

omeli [17]3 years ago

6 0

Step-by-step explanation:

-6+(-5)

-6-5

= -11

-3+6

= 3

Mark ‼️ it brainliest if it helps you ❤️

Y_Kistochka [10]3 years ago

3 0

Answer:

Hello!!

$-6+(-5)=-11$

$-3+6=3$

Step-by-step explanation:

Simplify the first expression and add the second expression

Hope this helps!!

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Could you help me with this problem

Doss [256]

Answer:

For x

We use cosine

cos 45° = 2/x

After solving

x = 2√2

Since we have the value of x we use it to get the value of y

we use cosine

cos 60° = 2√2/y

y =2√2/cos 60

y = 4√2

We use Pythagoras theorem to find z

(4√2)² = (2√2)² + z²

z² = 32 - 8

z² = 24

z = √24

z = 2√6

Therefore x = 2√2

y = 4√2

z = 2√6

Hope this helps.

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3 years ago

Find the lateral surface area of the prism.

tino4ka555 [31]

Answer: 20+20+240+192=472

Step-by-step explanation:

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3 years ago

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The vertical angle to the top of a flagpole from point A on the ground is observed to be 37°11'. The observer walks 17 m directl

inysia [295]

Answer:

22m

Step-by-step explanation:

Let height of flagpole=h

AB==17 m

$\angle CAD=37^{\circ}11'=37+\frac{11}{60}=37.183^{\circ}$ (1 degree= 60 minute)

$\angle B=25^{\circ}43'=25+\frac{43}{60}=25.72^{\circ}$

We have to find the approximate height of the flagpole.

In triangle CDA,

$\frac{CD}{DA}=tan\theta=\frac{Perpendicular\;side}{Base}$

$\frac{h}{DA}=tan37.183^{\circ}$

$h=DA(0.759)$

In triangle CDB,

$tan 25.72^{\circ}=\frac{CD}{DB}$

$0.482=\frac{h}{DA+17}$

$0.482DA+8.194=h$

Substitute the value

$0.482DA+8.194=0.759DA$

$8.194=0.759DA-0.482DA$

$8.194=0.277DA$

$DA=\frac{8.194}{0.277}=29.58$

Substitute the value

$h=29.58 \times 0.759=22.45 m\approx 22m$

Hence, the height of the flagpole=22 m

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3 years ago

Find the area of a rectangle whose base is 15 ft and its height is 4 ft.

Novosadov [1.4K]

Answer:

Step-by-step explanation:

15 times 4 equals 60

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3 years ago

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Help me please please please . 4 - 2 3/4 please show ur work

Aleksandr-060686 [28]

Answer:

$1\frac{1}{4}$ $or$ $1.25$

Step-by-step explanation:

$4-2\frac{3}{4}$

$4-\frac{11}{4}$

$\frac{16}{4} -\frac{11}{4}$

$\frac{16-11}{4}$

$\frac{5}{4}$

$1\frac{1}{4}$ $or$ $1.25$

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3 years ago

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