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Sladkaya [172]
3 years ago
14

What is x given angle ABC~ angle DBE~ ?

Mathematics
2 answers:
Dovator [93]3 years ago
6 0

30:50 = 3:5

x : x+25 = 3:5

25/2 x 3 = 37.5

lakkis [162]3 years ago
4 0

Answer:

x = 37.5

Step-by-step explanation:

Find the ratio.

\frac{x}{x+25}=\frac{30}{50}

Cross-multiply, distribute.

50x=30(x+25)\\\\50x=30x+750

Subtract 30x from both sides.

20x=750

Divide both sides by 20.

x=37.5

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Step-by-step explanation:

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Select the postulate that is illustrated for the real numbers.
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<span>Multiplication identity.
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The sum of three consecutive multiples"<br>of 8 is 192. Find the multiples.​
goblinko [34]

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Can any kind soul help me ASAP!​
CaHeK987 [17]

Answer:

Hope it helps u

Step-by-step explanation:

As we know that ,

Mean = sum of the terms/ numbers of terms

But here grouped data is given so , we use the formula

Mean=∑[f. m]/ ∑f

where f is frequency and m is mid point of each height ,

Now first we have to find the mid point of each interval, where

midpoint of each interval = (lower boundary + upper boundary)/2

m1=(150+154)/2 = 152

m2=(155+159)/2= 157,now found other by same formula, for each interval

m3= 162

m4= 167

m5=172    Now we find the midpoint of each interval ,so now

∑[f. m]=f1*m1+f2*m2+f3*m3+f4*m4+f5*m5

now putting the values of each frequency for given interval and midpoint of each interval we will get,

∑[f. m]=456+942+1296+167*x+344 = 167*x+3038

Now find,

∑f=f1+f2+f3+f4+f5

∑f=19+x

Now we have,

∑[f. m]=167*x+3038

∑f=19+x

also given mean height=161.6 cm

putt these values in above equation we get,

161.6=\frac{167*x+3038}{19+x}

now solve this ,

161.6(19+x)=167*x+3038

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3070.4-3038=167*x-161.6*x

32.4=5.4*x

x=32.4/5.4

<h2>x=6   Ans........</h2>

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