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3 years ago

I’ll give brainly please help!!

Mathematics

1 answer:

vampirchik [111]3 years ago

3 0

Answer:

number 9 is A

number 10 is C

Step-by-step explanation:

number 9, rotate triangle

number 10, add the numbers/sides

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raul invests $1000 in a savings account that earns 5% interest compounded annually. how much money will he have in the account a

12345 [234]

Amount in the bank account = 1000(1 + 0.05)^5 = $1,276.28

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4 years ago

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Sydney is cutting the crust from the edges of her sandwich. The dimensions, in centimeters, of the sandwich is shown.

Luba_88 [7]

Answer:

8x^2 + 34; 45.52 centimeters

Step-by-step explanation:

The perimeter is twice the sum of adjacent edges of a rectangle:

P = 2((2x^2 +9) +(2x^2 +8)) = 2(4x^2 +17)

P = 8x^2 +34

Then when x=1.2, the perimeter is ...

P = 8(1.2^2) +34 = 8·1.44 +34 = 45.52 . . . . cm

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3 years ago

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There are 3 bracelets with 6 beads how many beads are there together whats 3 times 6

Studentka2010 [4]

Answer:

Step-by-step explanation:

6 x 3 = 18

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3 years ago

2 bags of dog food cost $10.50. How much would amelia spend on 5 bags of dog food?

11111nata11111 [884]

$52.5

Explanation:
$10.50 × 5 = $52.5

5 0

4 years ago

Solve the system <br> 2x+2y+z=-2 <br> -x-2y+2z=-5<br> 2x+4y+z=0

drek231 [11]

The values of (x,y,z) are (3,-1,-2) , if the given are equations $2x+2y+z=- 2$ , $-x-2y+2z=-5$ and $2x+4y+z=0$ .

Step-by-step explanation:

The given is,

$2x+2y+z=- 2$ .......................................(1)

$-x-2y+2z=-5$ ......................................(2)

$2x+4y+z=0$ .........................................(3)

Step:1

Equation (2) is multiplied by -1 ( Eqn(2) × -1 )

$x+2y-2z=5$ .............................(4)

Subtract the equation (1) and (4)

$2x+2y+z=- 2$

$x+2y-2z=5$

( - )

$(2x-x)+(2y-2y)+(z+2z)=(-2-5)$

$x+3z=-7$ ......................(5)

Step:2

Equation (2) is multiplied by -2 ( Eqn(2) × -2)

$2x+4y-4z=10$ ........................(6)

Subtract equation (6) and (3),

$2x+4y-4z=10$

$2x+4y+z=0$

( - )

$(2x-2x)+(4y-4y)+(-4z-z)= (10-0)$

$-5z=10$

$z = - \frac{10}{5}$

z = -2

From the equation (5),

$x+3z=-7$

$x+(3)(-2)=-7$

$x = -7+6$

x = -1

From equation (1),

$2x+2y+z=- 2$

Substitute x and z values,

$(2)(-1)+2y+(-2)=-2$

$2y - 4=2$

$2y=4-2$

$2y=2$

$y=\frac{2}{2}$

y = 1

Step:3

Check for solution,

$-x-2y+2z=-5$

Substitute x,y and z values,

$-(-1)-(2)(1)+(2)(-2)=-5$

$1-2-4=-5$

-5 = -5

Result:

The values of (x,y,z) are (3,-1,-2) , if the given are equations $2x+2y+z=- 2$ , $-x-2y+2z=-5$ and $2x+4y+z=0$ .

8 0

4 years ago