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3 years ago

13

What is the total cost or sale price to the nearest cent? $10 lamp; 5% tax

1 answer:

Maurinko [17]3 years ago

3 0

10 times .05 is 10.50 so $10.50

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Richard and Teo have a combined age of 31. Richard is 13 years older than twice Teo's age. How old are Richard and Teo?

DochEvi [55]

Answer:

Richard is 22 and Teo is 9

Step-by-step explanation:

Teo's age:

31-13

=18 divided by 2

=9

Richard's age:

31-9

=22

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3 years ago

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3 years ago

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KatRina [158]

Answer:

a, d, f

Step-by-step explanation:

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3 years ago

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Evaluate each expression.

KonstantinChe [14]

Answer:

Please check the explanation.

Step-by-step explanation:

Solving the expressions

7)

given the expression

$\left(-7\right)+\:\left(-10\right)\:-\:5\:+2$

$\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}$

$\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:\:$

$\mathrm{Apply\:rule\:}+\left(-a\right)\:=\:-a$

so

$=\left(-7\right)-10-5+2$

$=-17-5+2$

$=-22+2$

$=-20$

8)

$\left(-9\right)+4+\left(-8\right)-\left(-7\right)$

$\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}$

$\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:\:$

$\mathrm{Apply\:rule\:}+\left(-a\right)\:=\:-a$

so

$=-5+\left(-8\right)-\left(-7\right)$

$=-5-8-\left(-7\right)$

$=-13-\left(-7\right)$

$=-13+7$

$=-6$

9)

$\left(-6\right)\:-\:\left(2\:\times \:4\right)\:-\:\left(-1\right)\:$

$\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}$

$\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:\:$

so

$\left(-6\right)-\left(2\times \:4\right)-\left(-1\right)$

Calculate within parentheses

$=\left(-6\right)-8-\left(-1\right)$

$=-14-\left(-1\right)$

$=-14+1$

$=-13$

10)

$\left(-8\right)\:+\:\left(-4\:\div \:-4\right)\:-\:8$

solving

$\left(-8\right)+\left(-\frac{4}{-4}\right)-8$

$\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a$

$=-8-\frac{4}{-4}-8$

$=-8-\left(-1\right)-8$

$\mathrm{Apply\:rule}\:-\left(-a\right)=a$

$=-8+1-8$

$\mathrm{Add/Subtract\:the\:numbers:}\:-8+1-8=-15$

$=-15$

5 0

3 years ago

Bianca wants to multiply the equation below by 3 so she can solve a system of linear equations with the elimination method. What

grandymaker [24]

Answer:

$6y-12x=24$ .....Which is the required answer.

Step-by-step explanation:

$2y-4x=8$

Bianca wants to multiply the equation below by 3

So she can solve a system of linear equations with the elimination method.

To Find:

What will the new equation be once she multiplies?

Solution:

$2y-4x=8$

Multiply the above equation through out by 3 we get

$3(2y - 4x)=3\times 8$

Applying Distributive Property i.e A(B+C)=AB + AC we get

$3\times 2y -3\times 4x=3\times 8$

$6y -12x=24$ .....Which is the required answer.

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4 years ago