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3 years ago

PLEASE HELP ME!!! QUICKLY PLEASEEE

Mathematics

1 answer:

Mumz [18]3 years ago

3 0

Answer:

-2988 is the answer

Step-by-step explanation:

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I don’t understand someone explain

Lunna [17]

Answer:

B is the correct answer

a*b/a+b = a^3-3a^2b+3ab^2-b^3/(a-b)(a-b)

= (a-b)^3/(a-b)^2

= (a-b)

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3 years ago

What is 4.87 x 7.23 (show ur work)

rewona [7]

Answer:

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3 years ago

Solve and check the fallowing system of equations algebraically x+y=5 plz Help Me

PSYCHO15rus [73]

Answer:y=-x+5

Step-by-step explanation:

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3 years ago

8. A right triangle has a perimeter of 60 cm. The legs have a ratio of 5:12. The hypotenuse is twice the

lakkis [162]

Answer:

a=24

b=10

c=26

Step-by-step explanation:

Perimeter is the sum of the sides ( $a+b+c=60$ )

The legs (a and b) have a ratio of 5:12, which means that $5a=12b$ , which can be simplified to $\frac{5}{12} a=b$ , where b will be the smaller leg.

The hypotenuse will be double the smallest leg, 2b, increased by 6 meters, giving us an equation of $c=2b+6$

Let's plug these in to get one variable:

$a+b+c=60\\a+b+2b+6=60\\a+\frac{5}{12}a+2(\frac{5}{12}a)+6=60\\\frac{12}{12}a+\frac{5}{12}a+\frac{10}{12}a+6=60\\\frac{12}{12}a+\frac{5}{12}a+\frac{10}{12}a=54\\\frac{27a}{12}=54\\27a=648\\a=24$

Now that we have a, we can plug it in to our previous equations to find our other sides:

$5a=12b\\5(24)=12b\\120=12b\\10=b$

$c=2b+6\\c=2(10)+6\\c=20+6\\c=26$

Double-checking:

$a+b+c=60\\24+10+26=60\\60=60$

7 0

3 years ago

Of the 450 students in the 6th grade at Graceland middle school, 75% ride the bus to school. How many 6th grade students to not

DIA [1.3K]

Answer:

112 or 113

Step-by-step explanation:

75%=0.75

450*0.75=337.5

450-337.5=112.5

Or if 75% ride then 25% do not ride the bus.

450*0.25=112.5

Presumably you would round to 113

3 0

4 years ago