MATHEMATICS HIGH SCHOOL

What is 80% of 38 ? plzzzz help

Answers

Answer 1

Answer:

Answer:

30.4

Step-by-step explanation:

80x38/100

Answer 2

Answer: 80/100 *x/38
X=(38*80)/100
X=30.4

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What is the multiplicative inverse of -1/9

Answers

A multiplicative inverse is the same thing as a reciprocal, which is basically just flipping the fraction and changing the sign. Therefore the multiplicative inverse of -1/9 is 9

What is the multiplicative inverse of -1/9?

____________________________________________.
The multiplicative inverse of -1/9 is just 9.

Please help I can't figure this out :SIMPLIFY

here are the answer choices:
12 to the power of 12
12 to the power of 4
1 to the power of 12
1 to the power of 4

Answers

when you have powers of the same number in the numerator and the denominator, you gonna substract the power in denominator from the one in numerator.

For us it's: 16-4 =12

So the the remaining number is 12^12 (12 to the power of 12).

we can also write it out and strike through the same number of the number in the nominator and denominator:

12*12*12*12*12*12*12*12*12*12*12*12*12*12*12*12
_____
12*12*12*12

Striking 12*12*12*12 from both we are left with

12*12*12*12*12*12*12*12*12*12*12*12

or 12 to the power of 12

Solve 2cos^2x+3cosx-2=0

Answers

$\bf 2cos^2(x)+3cos(x)-2=0\impliedby \textit{so, notice is just a quadratic} \n\n\n\ [2cos(x)~~-~~1][cos(x)~~+~~2]=0\n\n -------------------------------\n\n 2cos(x)-1=0\implies 2cos(x)=1\implies cos(x)=\cfrac{1}{2} \n\n\n \measuredangle x=cos^(-1)\left( (1)/(2) \right)\implies \measuredangle x= \begin{cases} (\pi )/(3)\n\n (5\pi )/(3) \end{cases}\n\n -------------------------------\n\n cos(x)+2=0\implies cos(x)=-2$

now, for the second case, recall that the cosine is always a value between -1 and 1, so a -2 is just a way to say, such angle doesn't exist.

What quadrilaterals have opposite sides that are parallel

Answers

Answer: Parallelogram

We need two sets of opposite parallel sides to have a parallelogram. If there's only one pair of opposite parallel sides, and the other pair not parallel, then we have a trapezoid.

A rectangle is an example of a parallelogram. All rectangles are parallelograms. Not all parallelograms are rectangles.

An equation _____ has one solution.
always
sometimes
never

Answers

I think the correct answer from the choices listed above is the second option. An equation sometimes has one solution. A system of equation can have one solution when the equations intersect at one point. Equations can also have two or more number of solutions.

Answer:

Sometimes

Step-by-step explanation:

hope this helps u my friend

True or False.An artist plans to construct an open box from a 15 in. by 20 in. sheet of metal by cutting squares from the corners and folding up the sides.

Answers

Answer:

True.

Step-by-step explanation:

The artists is using simple math. When cutting squares from the corners he uses the same measure for each side of the figuer (because is a square) and the remaining sides thatare folded havethe same measures as the squares.

Cutting each side with the correct percent of the total surface in order to go from 20 in to 15 in.

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