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3 years ago

Solve for x Please help me with this

Mathematics

2 answers:

Maru [420]3 years ago

7 0

Answer:

hope this helps you look it once.

AfilCa [17]3 years ago

6 0

Answer:

x = 16, x = 17

Step-by-step explanation:

Given a line parallel to a side of a triangle and it intersects the other 2 sides, then it divides those sides proportionally, that is

$\frac{x+8}{20}$ = $\frac{2x-5}{22.5}$ ( cross- multiply )

20(2x - 5) = 22.5(x + 8)

40x - 100 = 22.5x + 180 ( subtract 22.5x from both sides )

17.5x - 100 = 180 ( add 100 to both sides )

17.5x = 280 ( divide both sides by 17.5 )

x = 16

----------------------------------------------------------------

$\frac{2x+8}{28}$ = $\frac{5x-4}{82-28}$ = $\frac{5x-4}{54}$ ( cross- multiply )

28(5x - 4) = 54(2x + 8)

140x - 112 = 108x + 432 ( subtract 108x from both sides )

32x - 112 = 432 ( add 112 to both sides )

32x = 544 ( divide both sides by 32 )

x = 17

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3 years ago

Choose the linear equations.

andrew-mc [135]

Answer:

y = $\frac{3}{3}$ x - 5

y = 2x + 5

Step-by-step explanation:

In linear equations, both variables x and y must have the exponent of 1 (i.e. they cannot have a small number at the top-right). And they cannot be in the exponents (i.e. cannot be the small number at the top-right).

7 0

3 years ago

PLEASE HELP! I WILL MARK TOU AS BRAINLEIST!

san4es73 [151]

Answer:

a.Z(-2,1)

b.Z(1,1)

c.Z(-3,2)

Step-by-step explanation:

z(-2,3)

Imagine this point on a graph.

Translate it down two units :

the x stays -2, by going down the y decreases 2 so 3-2=1

Z(-2,1)

Translate Right three units : I'm assuming that we use the answer from the first translation

Z(-2,1)

The y doesn't change this time the x increases 3 since we're moving to the right.

Z(1,1)

Translate up 1 and left 4:

Z(1,1)

by moving up one we have Z(1,2) then by moving 4 to the left we get Z(-3,2)

Hope this helps :)

6 0

3 years ago

Read 2 more answers

Each side of an equilateral triangle measures 9cm. Find the height, h, of the triangle.

lesantik [10]

$Heigh \ for\ equilateral \ triangle \ is \calculated\ from\ formula:\\\\h=\frac{\sqrt3}{2}a\\\\a-side\ of\ triangle\\\\a=9cm\\\\h=\frac{\sqrt3}{2}*9=\frac{9\sqrt3}{2}=4,5\sqrt2cm$

4 0

3 years ago

N - 89 > 171. what inequality below true. 1. n=82. 2. n=105. 3. n=268. 4. n=300. 5. n=312

Maru [420]

Answer:

1. Assume the contrary, namely that √2 + √3 + √5 = r, where r is a rational number.

Square the equality √2 + √3 = r − √5 to obtain 5 + 2

√6 = r2 + 5 − 2r

√5. It follows

that 2√6 + 2r

√5 is itself rational. Squaring again, we find that 24 + 20r2 + 8r

√30

is rational, and hence √30 is rational, too. Pythagoras’ method for proving that √2 is

irrational can now be applied to show that this is not true. Write √30 = m

n in lowest

terms; then transform this into m2 = 30n2. It follows that m is divisible by 2 and because

2( m

2 )2 = 15n2 it follows that n is divisible by 2 as well. So the fraction was not in lowest

terms, a contradiction. We conclude that the initial assumption was false, and therefore

√2 + √3 + √5 is irrational.

Step-by-step explanation:

7 0

3 years ago