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3 years ago

Helppppppppp plzzzzz

Mathematics

1 answer:

Shkiper50 [21]3 years ago

8 0

Answer: 4

Step-by-step explanation:

so you basically make the + sign into a - sign as when there is a + and - sign next to each other it will always change into a - sign so once you do that it will look like this

11+(-7)

11-7

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1.5x+0.75y what does x variable

Illusion [34]

Answer:

1.5

Step-by-step explanation:

3 0

3 years ago

If x = 2 + V3, then the value of (x + 1/x) is

ludmilkaskok [199]

Answer:

Step-by-step explanation:

Given

x + $\frac{1}{x}$ ← substitute x = 2 + $\sqrt{3}$

= 2 + $\sqrt{3}$ + $\frac{1}{2+\sqrt{3} }$

Rationalise the denominator of the fraction by multiplying the numerator/ denominator by the conjugate of the denominator.

The conjugate of 2 + $\sqrt{3}$ is 2 - $\sqrt{3}$ , thus

= 2 + $\sqrt{3}$ + $\frac{2-\sqrt{3} }{(2+\sqrt{3} )(2-\sqrt{3}) }$

= 2 + $\sqrt{3}$ + $\frac{2-\sqrt{3} }{4-3}$

= 2 + $\sqrt{3}$ + 2 - $\sqrt{3}$

= 4

6 0

3 years ago

Ok.......................................................

quester [9]

Answer:

Hello there do you need help, if so what is he problem:)

Step-by-step explanation:

7 0

3 years ago

Translate to an equation and solve. Let x be the unknown number.

Paraphin [41]

Answer:

x= 376

Step-by-step explanation:

100/25=4

94*4=376

3 0

3 years ago

A. 5.1<br> B. 5.2<br> C. 14.3<br> D. 14.4

vladimir2022 [97]

Answer:

Step-by-step explanation:

If a line is parallel to a side of a triangle and it intersects the other 2 sides then it divides those sides proportionally.

BE is such a line , then

$\frac{AE}{ED}$ = $\frac{AB}{BC}$ ( substitute values )

$\frac{9}{5}$ = $\frac{9.2}{BC}$ ( cross- multiply )

9 BC = 46 ( divide both sides by 9 )

BC ≈ 5.1 ( to the nearest tenth )

Then

AC = AB + BC = 9.2 + 5.1 = 14.3

7 0

2 years ago