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3 years ago

Which statement is true?

Mathematics

1 answer:

Irina-Kira [14]3 years ago

3 0

I think it’s D because the definite can’t be a negative

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What are the steps to answer 3(d-8)-5=9(d+2)+1

Elena L [17]

First expand $3\left(d-8\right)-5$

$\mathrm{Distribute\:parentheses\:using}:\ \:a\left(b+c\right)=ab+ac$
$Where\; a=3,\:b=d,\:c=-8$

$3\cdot \:d+3\left(-8\right) \ \textgreater \ \mathrm{Apply\:minus-plus\:rules} \ \textgreater \ +\left(-a\right)=-a \ \textgreater \ 3d-3\cdot \:8$

$\mathrm{Multiply\:the\:numbers:}\:3\cdot \:8=24 \ \textgreater \ 3d-24 \ \textgreater \ 3d-24-5$

$\mathrm{Subtract\:the\:numbers:}\:-24-5=-29 \ \textgreater \ 3d-29$

Now expand $9\left(d+2\right)+1$

$\mathrm{Distribute\:parentheses\:using}:\ \:a\left(b+c\right)=ab+ac$
$Where\; a=9,\:b=d,\:c=2$

$9\cdot \:d+9\cdot \:2 \ \textgreater \ \mathrm{Multiply\:the\:numbers:}\:9\cdot \:2=18 \ \textgreater \ 9d+18$

$9d+18+1 \ \textgreater \ \mathrm{Add\:the\:numbers:}\:18+1=19 \ \textgreater \ 9d+19$

Now we have $3d-29=9d+19$

$\mathrm{Add\:}29\mathrm{\:to\:both\:sides} \ \textgreater \ 3d-29+29=9d+19+29 \ \textgreater \ \mathrm{Simplify}$

$3d=9d+48 \ \textgreater \ \mathrm{Subtract\:}9d\mathrm{\:from\:both\:sides} \ \textgreater \ 3d-9d=9d+48-9d$

$Simplify\;again\; \ \textgreater \ -6d=48 \ \textgreater \ \mathrm{Divide\:both\:sides\:by\:}-6 \ \textgreater \ \frac{-6d}{-6}=\frac{48}{-6}$

$Simplify\;once\;more\;\ \textgreater \ d=-8$

Hope this helps!

8 0

3 years ago

Find the perimeter of a rectangle that is 3 inches long and 4 inches wide.

katen-ka-za [31]

Answer:

14 inches

Step-by-step explanation:

Perimeter of a rectangle

= 2(l + w)

Given length L = 3 inches and

Width w = 4 inches

Perimeter = 2(3 + 4)

Simplify the bracket

2 x 7

14 inches

4 0

4 years ago

Read 2 more answers

Question 2 of 5

valentinak56 [21]

Answer:

C is the correct answer

Step-by-step explanation:

A) 25-18 which equals 7

7 is NOT bigger than 8

B) 0.5x18= 9

7 is NOT bigger than 9

C) 18÷6=3

3 IS bigger than 2 so is correct

D) 18÷4= 4.5

4.5 is NOT bigger than 3

hope this helps!

6 0

3 years ago

Read 2 more answers

A washer and a dryer cost $597 combined. The washer costs $53 less than the dryer. What is the cost of the dryer?

Volgvan

Answer:

w + d = 797

w = d - 53

Because they are equal, we can take whatever is on one side of the = and replace it for what's on the other side.

d - 53 + d = 797

2d = 850

d = 425

Step-by-step explanation:

3 0

3 years ago

There are 36 Red Marbles and 44 Blue marbles put into a bag. What is the probability of drawing a red marble out of the bag?

tigry1 [53]

The probability of drawing a red marble is 45%
I hope this was right and helpful and sorry for responding so late

7 0

3 years ago