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PilotLPTM [1.2K]
3 years ago
13

What is the solution to this equation? 7x-12x-5=-45+15 A. x=-5 B. x=5 C. x=7 D. x=-7

Mathematics
1 answer:
olchik [2.2K]3 years ago
7 0
7(5)-12(5)-5=-45+15

-30 = -30

answer= B. x=5
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Simplify x^3 y^3 / x^3 y^3
Marysya12 [62]

Answer:

\frac{1}{y}

Step-by-step explanation:

When simplifying an exponent a way to do is to expand the exponent. This means that it will now be

\frac{x*x*x*y*y*y}{x*x*x*y*y}

Whenever you see an x or y on the numerator and denominator cross it out because it is the same thing as 1

When you cross out all of the x's and y's the only variable left is y in the denominator. This means that the answer is \frac{1}{y}

5 0
3 years ago
What is x * 5 = 25 idk what this mean
morpeh [17]
5x = 25
x = 5

anything 2 ask please pm me
6 0
3 years ago
Read 2 more answers
Please help, I need input on if I did this correctly and you just substitute.
kow [346]

The value of h(t) when t=\frac{15}{32} is 10.02.

Solution:

Given function h(t)=-16t^2+15t+6.5

To find the value of h(t) when t=\frac{15}{32}:

h(t)=-16t^2+15t+6.5

Substitute t=\frac{15}{32} in the given function.

$h\left(\frac{15}{32} \right)=-16\left(\frac{15}{32} \right)^2+15\left(\frac{15}{32} \right)+6.5

            $=-16\left(\frac{225}{1024} \right)+15\left(\frac{15}{32} \right)+6.5

Now multiply the common terms into inside the bracket.

           $=-\left(\frac{3600}{1024} \right)+\left(\frac{225}{32} \right)+6.5

Now, in the first term, the numerator and denominator both have common factor 16. So reduce the first term into the lowest term.

          $=-\left(\frac{225}{64} \right)+\left(\frac{225}{32} \right)+6.5

To make the denominator same, take LCM of the denominators.

LCM of 64 and 32 = 64

        $=-\left(\frac{225}{64} \right)+\left(\frac{225\times2}{32\times2} \right)+6.5\times\frac{64}{64}

        $=-\frac{225}{64} +\frac{450}{64}+\frac{416}{64}

        $=\frac{-225+450+416}{64}

       $=\frac{641}{64}

       = 10.02

$h\left(\frac{15}{32} \right)=10.02

Hence the value of h(t) when t=\frac{15}{32} is 10.02.

8 0
3 years ago
Please help me to solve the problems
OLga [1]
4 tens and 10 ones is 410
412 movies
3 0
3 years ago
During first semester the ratio of the number of students in art class to the number of students in gym class was 2:7. However t
elena-s [515]
5/4 = 75/g....cross multiply because this is a proportion
5g = 300
g = 300/5
g = 60
so in 2nd semester, there were 75 students in art class and 60 students in gym class....for a total of 135 students.

1st semester....ratio was 2:7...added = 9
art : 2/9(135) = 270/9 = 30 <=== art class had 30
gym: 7/9(135) = 945/9 = 105 <=== gym class had 105

4 0
3 years ago
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