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3 years ago

Plzzzz helllp mmmmeee thx

Mathematics

2 answers:

geniusboy [140]3 years ago

7 0

Answer: 3x^2-30x+5

Step-by-step explanation:

Use (a+b)^2=a^2-2ab^2+b2

3(x^2-10x+25)-70

Distribute the 3 which is

3x^2-30x+75-70

Subtract the numbers {75-70} and simplify

3x^2-30x+5

DaniilM [7]3 years ago

5 0

It’s A you have the right answer highlighted

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HELP ME PLEASE IM BEGGING PLEASEEEEEEEEEEEEEEEEEEEEEEE IM GONNA K M S IF I DONT GET THIS ANSWERED IN 5 MINUTES!

jeka94

Answer:

Batch 1: 3 and 1/2 Pineapple, and 1 and 2/5 banana.

Batch 2: 8 pineapple, and 4 and 4/5 coconut.

Batch 3: 1 banana, and 1 and 1/2 coconut.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Andrea, Justin, and Virginia went to an office supply store. Andrea bought 6 pencils, 7 markers, and 8 erasers. Her total was $1

olga2289 [7]

Answer:

$x=0.25\,,\,y=1.75\,,\,z=0.25$

Step-by-step explanation:

Let $x,y,z$ denotes number of pencils, markers, erasers respectively.

For Andrea:

$6x+7y+8z=15.75\,\,\,(i)$

For Justin:

$6x+8y+5z=16.75\,\,\,(ii)$

For Virginia:

$5x+5y+7z=11.75\,\,\,(iii)$

On subtracting equations (i) and (ii), we get

$(6x+7y+8z)-(6x+8y+5z)=15.75-16.75\\-y+3z=-1\\y-3z=1\\y=1+3z$

Put $y=1+3z$ in equation (i)

$6x+7(1+3z)+8z=15.75\\6x+29z=8.75\,\,\,(iv)$

Put $y=1+3z$ in equation (iii)

$5x+5(1+3z)+7z=11.75\\5x+22z=6.75\,\,\,(v)$

Multiply equation (iv) by 5 and equation (v) by 6 and then subtract both the equations.

$5(6x+29z)-6(5x+22z)=5(8.75)-6(6.75)\\13z=3.25\\z=\frac{3.25}{13}=0.25$

Put $z=0.25$ in equation $y=1+3z$

$y=1+3(0.25)=1.75$

Put $y=1.75\,,\,z=0.25$ in equation (i)

$6x+7(1.75)+8(0.25)=15.75\\6x+12.25+2=15.75\\6x=1.5\\x=0.25$

8 0

3 years ago

Iii Write down the length and width of the block.

Svetlanka [38]

Answer:
Length: 30
Width: 25
Height: 5

7 0

2 years ago

I need the top 2 pls

Andreas93 [3]

Answer:

Step-by-step explanation:

7:8 is 7/8

9:5

5 0

3 years ago

Jordan needs 6 3/10 gallons of milk to make 4 1/2 gallons of ice cream. How much gallons of milk will Jordan need to make one ga

ss7ja [257]

Answer:

45/63

Step-by-step explanation:

6 3/10=63/10, 4 1/2=45/10,

(45/10)/(63/10)=45/63

6 0

3 years ago