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3 years ago

Find the lowest common denominator and solve

Mathematics

1 answer:

irina [24]3 years ago

4 0

Answer:

the correct answer is d

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If ED = x + 4 and DB = 3x - 8, find ED, DB, and EB

Tom [10]

Answer:

Part 1) $ED=10\ units$

Part 2) $DB=10\ units$

Part 3) $EB=20\ units$

Step-by-step explanation:

we know that

EB=ED+DB

ED=DB -----> given problem

Substitute the given values and solve for x

$x+4=3x-8$

$3x-x=4+8$

$2x=12$

$x=6$

Find the value of ED

$ED=x+4$

substitute the value of x

$ED=6+4=10\ units$

Find the value of DB

Remember that

ED=DB

therefore

$DB=10\ units$

Find the value of EB

EB=ED+DB

$EB=10+10=20\ units$

5 0

3 years ago

Read 2 more answers

A plant grows at a constant rate of __ cm per day.

devlian [24]

Plant grows at 3CM per day

equation: y= 3x

21 is y so 21= 3x. divide by 3 so it's been 7 days

3 0

3 years ago

He formula for the circumference of a circle is C = 2r, where r is the radius and C is the circumference. The equation solved fo

Anni [7]

I think the answer is r=8..
hope this helps!:)

6 0

3 years ago

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The distance from Houston to

marissa [1.9K]

Answer:

distance from Houston to Galveston in kilometers will be: 80km

Step-by-step explanation:

Given

The distance from Houston to Galveston is about 50 miles.

i.e.

Kilometers in 1 Mile = 1.6 km

As the distance from Houston to Galveston is about 50 miles, so

The distance from Houston to Galveston in kilometers will be:

50(1.6) = 80 ∵ Kilometers in 1 Mile = 1.6 km

Therefore,

The distance from Houston to Galveston in kilometers will be: 80km

8 0

3 years ago

A student answers a multiple-choice examination question that offers four possible answers. Suppose the probability that the stu

Nitella [24]

Answer: 0.9730

Step-by-step explanation:

Let A be the event of the answer being correct and B be the event of the knew the answer.

Given: $P(A)=0.9$

$P(A^c)=0.1$

$P(B|A^{C})=0.25$

If it is given that the answer is correct , then the probability that he guess the answer $P(B|A)= 1$

By Bayes theorem , we have

$P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(C|A^c)P(A^c)}$

$=\dfrac{(1)(0.9)}{(1))(0.9)+(0.25)(0.1)}\\\\=0.972972972973\approx0.9730$

Hence, the student correctly answers a question, the probability that the student really knew the correct answer is 0.9730.

7 0

3 years ago