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3 years ago

Use mental math to find us some draw or describe the strategy you used 52+19 = 71

1 answer:

7 0

1. Set up long addition.

5 2
+1 9
______

2. Calculate 2+ 9, which is 11.
Since 11 is two-digit, we carry the first digit 1 to
the next column.
1
5 2
+1 9
_____
1

3. Calculate 5+1, which is 6. Now add the
carry digit of 1, which is 7.
1
5 2
+ 1 9
______
7 1

4. Therefore, 52 + 19 = 71.

71

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Solve the system of linear equations using any method 6x+6y=-6, 5x+y=-13

Sergio [31]

Answer:

x=-3

y=2

Step-by-step explanation:

To solve this problem you can use the elimination method:

- Multiply the second equation by -6:

$(-6)5x+y=-13\\-30x-6y=78$

- Add both equations:

$6x+6y=-6\\-30x-6y=78\\-------\\-24x=72\\x=-3$

- Substitute the value of x into one of the original equations and solve for y:

$6(-3)+6y=-6\\-18+6y=-6\\6y=12\\y=2$

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3 years ago

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Rewrite each expression so that each term is in the form kxn, where k is a real number, x is a positive real number,

MaRussiya [10]

Answer:

So the equation in standard form will be $x^{\frac{-1}{3}}$

Step-by-step explanation:

We have given equation $x^{\frac{-2}{3}}\times x^{\frac{1}{3}}$

We have to write this expression in standard form

For writing in standard form first we have to do operation on the expression

We know that there is property of exponent that when two functions are multiplied with each other then there exponent are added

So $x^{\frac{-2}{3}}\times x^{\frac{1}{3}}=x^{\frac{-2}{3}+\frac{1}{3}}=x^{\frac{-1}{3}}$

So the equation in standard form will be $x^{\frac{-1}{3}}$

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4 years ago

Which has the greater surface area? A 6-centimeter cube or a rectangular prism with a 3 centimeter square base and a height of 1

bazaltina [42]

Answer:

The prism

Step-by-step explanation:

The surface area of a cube is:

$A=6L^2$

where

L is the length of the side

For the cube in this problem,

L = 6 cm

So the surface area of the cube is

$A=6\cdot 6^2 = 36 cm^2$

The surface area of a rectangular prism with squared base is:

$A=2L^2+4Lh$

where

L is the length of the base

h is the height of the prism

For the prism in this problem,

L = 3 cm

h = 12 cm

Therefore,

$A=2\cdot 3^2 + 4(3)(12)=162 cm^2$

So, the prism has a greater surface area.

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3 years ago

Which is not an improper fraction equal to 8?

Aleonysh [2.5K]

<span>There are many improper fraction equal to eight, they include: 8/1, 16/2, 24/3, 32/4, 40/5, 48/6, 56/7, 64/8, 72/9 etc.When a multiple of eight is divided by the other factor with with when multiplied to eight gives the multiple, the result will be eight.</span>

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4 years ago

40 points. Find the sum and express it in the simplest form.

lora16 [44]

7u^3 - u^2 - 7 + 2u^3 - 4u^2

(7+2)u^3 -(1+4)u^2 - 7

9u^3 - 5u^2 - 7

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3 years ago

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