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IrinaVladis [17]
3 years ago
13

Help me answer this pls

Mathematics
1 answer:
KengaRu [80]3 years ago
8 0

Answer:

x = 36.5

Step-by-step explanation:

The two triangles are similar so we can use the similarity ratio to find x

AB ~ DE and BD ~ BA

15/31 = x/(x+39) cross multiply expressions

31x = 15x + 585

31x - 15x = 585

16x = 585 divide both sides by 16

x = 36.5 approximately

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Y^2=16 please helps me
zvonat [6]

Answer: y = 4

Step-by-step explanation:

4 * 4 = 16

3 0
3 years ago
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In a couple of sentences and your own words describe how to re-write an expression that's in radical form into an expression wit
Serga [27]
In order to rewrite an expression in radical form using exponents, we must consider the power of the root (is the radical the typical square root, cubed root, etc) and the value of any exponents contained in the radical. 

Using this information, we will make the power of the radical the denominator of our exponent, and whatever exponent is contained in the radical will become the numerator.

Example:
√(x³) = square root of x³ = x^(3/2)
3 0
4 years ago
A total of 60% of the customers of a fast food chain order a hamburger, French fries, and a drink. If a random sample of 15 cash
Ne4ueva [31]

Answer:

C. 0.403

Step-by-step explanation:

Binomial distribution has two parameter n and p. Here, n=15 and p=0.60.

We have to find the probability of 10 or more will show that the hamburger, French fries and a drink were ordered. P(X≥10)=?

The binomial probability distribution function for random variable X  is

P(X=x)=nCxp^{x} q^{n-x}

where q=1-p=1-0.6=0.4,n=15 and p=0.6.

P(X≥10)=P(X=10)+P(X=11)+P(X=12)+P(X=13)+P(X=14)+P(X=15)

P(X=10)=15C10(0.6^{10})( 0.4^{5}) =0.185938

P(X=11)=15C11(0.6^{11}) (0.4^{4}) =0.126776

P(X=12)=15C12(0.6^{12}) (0.4^{3}) =0.063388

P(X=13)=15C13(0.6^{13}) (0.4^{2}) =0.021942

P(X=14)=15C14(0.6^{14}) (0.4^{1}) =0.004702

P(X=15)=15C15(0.6^{15}) (0.4^{0}) =0.000470

P(X≥10)= 0.185938 +0.126776 +0.063388 +0.021942 +0.004702 +0.000470

P(X≥10)=0.403216

So, the probability of 10 or more will show that the hamburger, French fries and a drink were ordered is 0.403.

8 0
3 years ago
Over the summer, Jackie played video games 3 hours per day. When school began in the fall, she only allowed to play video games
erik [133]
So to find this we divide 3 by 1/2 and get 6. So, she is now only at 1/6 of her original time.1/6 is equal to .1666, and to the nearest percent that would be 17%. hope this helps and its not too late!
3 0
3 years ago
Fill in the blanks. Please answer as shown in the boxes. Please fill out all boxes. Will mark brainiest if correct
jarptica [38.1K]

Answer:

(5x + 7y)² = 25x² + 70xy + 49y²

Step-by-step explanation:

(5x + 7y)² = 25x² + 70xy + 49y²

Because,

(5x + b)² = (5x)² + 2(5x)(b) + b²

2(5x)(b) = 70xy

b = 7y

b² = (7y)² = 49y²

6 0
4 years ago
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