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3 years ago

What is the discriminant of 3x squared -10x= -2

Mathematics

1 answer:

artcher [175]3 years ago

3 0

The discriminant of the equation $3 x^{2} -10x=-2$ is 76.
I hope that helps.

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Brice needs 2 feet of ribbon to tie a bow around a birthday present. He has has 3 feet of ribbon. Is that enough?

maks197457 [2]

Hello,

Here is your answer:

The proper answer to this question is "Yes"!

Here's why:

Brice needs TWO FEET for the present:

He has THREE FEET of ribbon:

3-2=1

Which means Brice should have one feet of ribbon left over!

Your answer is Yes!

If you need anymore help feel free to ask me!

Hope this helps!

7 0

4 years ago

<img src="https://tex.z-dn.net/?f=%20-%203%289x%20%2B%2020%29%20%5Cgeqslant%2015x%20-%2020" id="TexFormula1" title=" - 3(9x + 20

Len [333]

Answer:

$x\le \:-\frac{20}{21}$

Step-by-step explanation:

$-3\left(9x+20\right)\ge \:15x-20\\\\\mathrm{Expand\:}-3\left(9x+20\right):\quad -27x-60\\-27x-60\ge \:15x-20\\\\\mathrm{Add\:}60\mathrm{\:to\:both\:sides}\\-27x-60+60\ge \:15x-20+60\\\\\mathrm{Simplify}\\-27x\ge \:15x+40\\\\\mathrm{Subtract\:}15x\mathrm{\:from\:both\:sides}\\-27x-15x\ge \:15x+40-15x\\\\\mathrm{Simplify}\\-42x\ge \:40\\\\\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)}\\\left(-42x\right)\left(-1\right)\le \:40\left(-1\right)$

$Simplify\\42x\le \:-40\\\\\mathrm{Divide\:both\:sides\:by\:}42\\\frac{42x}{42}\le \frac{-40}{42}\\\\Simplify\\x\le \:-\frac{20}{21}$

6 0

3 years ago

X/5 + 7 = 42 PLS HELP

Drupady [299]

Answer:203

Step-by-step explanation: multiply 5 on both sides to get rid of the fraction.

You’ll get : x+ 7 = 210

Then subtract 7 from 210. You’ll get 203.

4 0

3 years ago

Can someone do this thanks and quickly:)

MArishka [77]

Answer:

This figure is a quadrilateral, and therefore the sum of the interior angles must be 360°. Adding them up, we get 40° + 128° + x + 82° = 360°, or

168° + 82° + x = 360°, or 250° + x = 360. Subtracting 250° from both sides results in 110°, which is the measure of x.

Step-by-step explanation:

3 0

3 years ago

Let A and B be n-by-n matrices in R^n, and let c be a real number. Which of the following statements about trace is not necessar

JulsSmile [24]

Answer:

c. tr(AB) = tr(A)tr(B)

Step-by-step explanation:

The trace of a matrix is only valid for a square matrix, that is a n by n matrix. The trace of a matrix is the sum of all its diagonal elements. The following properties of trace holds for a matrix A and B with size n by n and a real number c.

i) The trace sum of two matrix is equal to the sum of their individual traces. That is:

tr(A + B) = tr(A) + tr(B)

ii) The trace of the product of a scalar and a matrix is the same as the product of the scalar and the trace of the product, that is:

tr(cA) = ctr(A)

iii) The trace of a transpose of a matrix is equal to the trace of the matrix, that is:

$tr(A^T)=tr(A)$

iv) The trace of a product of matrix is given as:

tr(AB) = tr(BA)

7 0

4 years ago