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3 years ago

• A rational number is such that when you multiply it by

Mathematics

1 answer:

Tatiana [17]3 years ago

7 0

Answer:

The number is -1/2.

Step-by-step explanation:

I am assuming they are fractions. So we have the equation:

5/2 x + 2/3 = -7/12

We multiply through by 12 to eliminate the fractions:

5/2 * 12 x + 2/3 * 12 = -7/12 * 12

30x + 8 = -7

30x = -15

x = -15/30

x = -1/2.

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3 years ago

Find the measure of each numbered angle

Liono4ka [1.6K]

Angle 2 is 360- 258= 102

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3 years ago

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Find the missing term of the following sequence. . . . –45, __, –12, . . .

julsineya [31]

(-45 + (-12) / 2 = -28.5
So the answer is -28.5

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3 years ago

Find the missing lengths: LO=5 and OK=4, find OH and KH.

hodyreva [135]

Answer:

The length of KH is 6 units and OH is 6.3 units.

Step-by-step explanation:

Given the figure with lengths LO=5 and OK=4. we have to find the length of OH and KH.

In ΔLOH

By Pythagoras theorem

$LH^2=LO^2+OH^2\\\\LH^2=5^2+OH^2$ → (1)

In ΔKOH,

$KH^2=OH^2+OK^2\\\\KH^2=OH^2+4^2$ → (2)

In ΔKHL,

$KL^2=LH^2+KH^2$

Using eq (1) and (2), we get

$KL^2=5^2+OH^2+OH^2+4^2$

$9^2=25+2OH^2+16$

⇒ $2OH^2=81-25-16=40$

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Put the above value in eq 2, we get

$KH^2=20+4^2=36$

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3 years ago

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Lines m and n are parallel. find the value of x. A. 15 B. 20 C. 65 D. 115

torisob [31]

Answer:

Option B, x = 20

Step-by-step explanation:

Step 1: Make an equation

The values of 65 degrees and (3x + 5) are equal.

65 = 3x + 5

Step 2: Subtract 5 from both sides

65 - 5 = 3x + 5 - 5

60 = 3x

Step 3: Divide both sides by 3

60 / 3 = 3x / 3

20 = x

Answer: Option B, x = 20

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3 years ago

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