2 years ago

Heyy!! i need help!!

Mathematics

2 answers:

Makovka662 [10]2 years ago

6 0

Answer:

X - 3 = 5

Step-by-step explanation:

X decreased by 3 means X-3.

If X - 3 is 5, then it can be written as X - 3 = 5

lilavasa [31]2 years ago

5 0

Answer: 8

Step-by-step explanation: 8 decreased (subtracted) by 3 is 5.

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What is the value of y?

enyata [817]

Answer:

y=68

Step-by-step explanation:

Okay, here we go.

180-56=124

124/2=62

62-12=50

62+50=112

180-112=68

y=68

Have a wonderful day!

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2 years ago

(1.357 X 10^9) + 590,000 =

borishaifa [10]

Answer:

1.35759 x 10 ⁹

Step-by-step explanation:

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3 years ago

What is the common denominator of x+5/x+8 =1+6/x+1

Kobotan [32]

It’s going to be x+8

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2 years ago

Read 2 more answers

Use a table to multiply (–5a)(2a – 1). A) –15a B) 5a2 + 10a C) –10a2 – 5a D) –10a2 + 5a

Varvara68 [4.7K]

Answer:

Step-by-step explanation:

Given the expression (–5a)(2a – 1)

Open the bracket

(–5a)(2a – 1)

= -5a(2a) -5a(-1)

= -10a² + 5a

<em>hence the equivalent expression is -10a² + 5a</em>

8 0

3 years ago

A is a 4x4 matrix and A^2 + 4A - 5I = 0. If det(A+2I)>0, enter det(A+2I)

maw [93]

$\mathbf A^2+4\mathbf A-5\mathbf I=0$
$\implies\mathbf A^2+4\mathbf A+4\mathbf I=(\mathbf A+2\mathbf I)^2=9\mathbf I$
$\implies\det\bigg((\mathbf A+2\mathbf I)^2\bigg)=\det(9\mathbf I)$
$\implies\det(\mathbf A+2\mathbf I)^2=9^4\det\mathbf I$
$\implies\det(\mathbf A+2\mathbf I)=\pm\sqrt{9^4}$
$\implies\det(\mathbf A+2\mathbf I)=9^2=81$

where we take the positive root because we're told that the determinant is positive.

5 0

3 years ago