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3 years ago

Evaluate the expression 7x^2y when x = 3 and y + 4 six grade math

Mathematics

1 answer:

Rom4ik [11]3 years ago

7 0

Answer:

21^8

Step-by-step explanation:

YUUUUPPPPPP

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Sarah made a scale drawing of a dinosaur she made the height of the dinosaur 2 1/2 inches the actual height of dinosaurs 9 feet

JulijaS [17]

Answer:

The scale used by Sarah is 1 to 43.2 inches ( drawing to actual)

Step-by-step explanation:

Here, we want to know the scale used for the drawing of the Dinosaur by sarah.

The actual height of the Dinosaur is 9 feet, but in her drawing she represented the height by 2.5 inches( 2 1/2 is same as 2.5 inches)

Mathematically, we know that 1 foot is 12 inches;

So the actual height of the Dinosaur is 9 * 12 = 108 inches

So practically, what she has done is to represent a height of 108 inches by 2.5 inches

So the scale factor used will be;

108/2.5 = 43.2

The scale used is 1 to 43.2 or simply 1:43.2 to represent the drawing to the actual

6 0

3 years ago

20 POINTS!!!!!!! PLZ HELP I HAVE 3 MINS. On Saturday, the bookstore sold x books. On Sunday, the bookstore sold 2 more books tha

Aloiza [94]

X+2x is your expression. Hope it helps and remember to mark as brainliest!

6 0

3 years ago

Read 2 more answers

16 tablespoon to milliliters

Brut [27]

Answer: The answer is: " 240 milliliters (mL) " .

_________________________________________________

Step-by-step explanation:

_________________________________________________

Given 16 Tablespoons ; Convert to "mL" .

Note: "milliliters" can be abbreviated as "mL" .

Note: 15 mL = 1 Tablespoon .

16 Tablespoons * ( $\frac{15 mL}{1 Tablespoon}$ ) ;

= (16 * 15) mL

= 240 mL .

_________________________________________________

The answer is: " 240 milliliters (mL) " .

_________________________________________________

3 0

3 years ago

Which is the simplified form of (9c^-9)^-3 b 1/729 c^27

rosijanka [135]

ANSWER

$(9 {c}^{ - 9} )^{ - 3}=\frac{{c}^{ 27} }{729}$

EXPLANATION

The given expression is

$(9 {c}^{ - 9} )^{ - 3}$

Recall that:

$({a}^{m} )^{n} = {a}^{mn}$

We use the law of exponents to get

$(9 {c}^{ - 9} )^{ - 3} = 9^{ - 3} {c}^{ - 9 \times - 3}$

Let us multiply in the exponents to get:

$(9 {c}^{ - 9} )^{ - 3} = 9^{ - 3} {c}^{ 27}$

Recall again that:

${a}^{ - m} = \frac{1}{ {a}^{m} }$

This implies that:

$(9 {c}^{ - 9} )^{ - 3} = \frac{1}{ {9}^{ 3} } \times {c}^{ 27}$

We expand the power to get:

$(9 {c}^{ - 9} )^{ - 3} = \frac{1}{9 \times 9 \times 9} \times {c}^{ 27}$

$(9 {c}^{ - 9} )^{ - 3}=\frac{1}{729} \times {c}^{ 27}$

We multiply out to get:

$(9 {c}^{ - 9} )^{ - 3}=\frac{{c}^{ 27} }{729}$

7 0

3 years ago

The perimeter of a square is 3/4 meters. What is the measure of its length in meters

telo118 [61]

Answer:The answer is 0.1875, or 3/16 (in fraction form)

Step-by-step explanation: 3/4 divided by 4, (a square is equal on all 4 sides)

And there you have it!!!

You're welcome :D

5 0

3 years ago