PLEASE ANSWER ONLY IF RIGHT.

Mathematics

1 answer:

Colt1911 [192]3 years ago

8 0

Answer:

• Second step → Division property of equality.

• Third step → Simplifying.

• Fourth step → Subtraction property of equality.

• last step → Simplifying [ answer ]

$.$

You might be interested in

Ricky answered 90% of the questions on his science test correctly. There were 50 questions on the test. How many questions did R

AnnZ [28]

Answer:

45 questions

Step-by-step explanation:

6 0

3 years ago

-21+x=49 what is X HELP PLS

iragen [17]

Answer:

The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol

6 0

3 years ago

Find the area of the square whose side is 3x + 4.

lidiya [134]

Answer:

64cm^2

Step-by-step explanation:

3+1+4=8

8×8= 64cm^2

3 0

4 years ago

Mike wants to work out the height of a tree which has a fence around it. From A he sees that the angle of elevation of the top i

larisa [96]

Answer: 13.8 m

Step-by-step explanation:

Given

From point A, angle of elevation is $19^{\circ}$

From point B which is 18 m closer, it changes to $32^{\circ}$

Suppose the height of tree is h

From figure, we can write

$\Rightarrow \tan 32=\dfrac{h}{x}\\\\\Rightarrow h=x\tan 32^{\circ}$

Similarly

$\Rightarrow \tan19^{\circ}=\dfrac{h}{x+18}\\\\\Rightarrow h=(x+18)\tan 19^{\circ}\\\text{Substitute the value of h}\\\Rightarrow x\tan 32^{\circ}=x\tan 19^{\circ}+18\tan 19^{\circ}\\\Rightarrow x(\tan32^{\circ}-\tan 19^{\circ})=18\tan 19^{\circ}\\\\\Rightarrow x=\dfrac{18\tan 19^{\circ}}{\tan32^{\circ}-\tan 19^{\circ}}\\\\\Rightarrow x=22.09\approx 22.1\ m$