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3 years ago

Select the expression equivalent to (-2x+8.1y)-(-9x+5.3y)

Mathematics

1 answer:

LuckyWell [14K]3 years ago

7 0

Answer:

7x+2.8y or y= -2.5x

Step-by-step explanation:

add 9x to -2x subtracy 5.3y from 8.1y switch sides of the x by subtracting it from both sides then divide the 2.8 to get -2.5x

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Gabriella is making monogrammed water bottles for a charity fundraiser. The first weekend, she sold 4 large water bottles and 3

ss7ja [257]

Answer: B) A large bottle costs $12, and a small one costs $8.

Where L is how many large bottles have been sold, and is how many small bottles have been sold.

In order to find out how much money the large bottle and small bottles cost, we must solve the system of equations.

Step 1: Subtract 3S from both sides

$4L+3S=72\\4L=72-3S$

Step 2: Divide both sides by 44.

$4L=72-3S \\\\L=18-\frac{3}{4}S$

Step 3: Replace L for $18-\frac{3}{4}S$

$6L+2S=88\\6(18-\frac{3}{4}S) +2S=88$

Step 4: Simplify

$6(18-\frac{3}{4}S)+2S=88\\108-4.5S+2S=88\\108-2.5S=88$

Step 5: Subtract 108 from both sides

$108-2.5S=88\\-2.5S=-20$

Step 6: Divide both sides by -2.5

$-2.5S=-20\\S=8$

Step 7: Replace S for 8

$4L+3S=72\\4L+3(8)=72\\$

Step 8: Divide both sides by 4

$4L+24=72\\L+6=18$

Step 9: Subtract 6 from both sides

$L+6=18\\L=12$

3 0

3 years ago

Indicate below wether the equation in the box is true or false 6/12= 1/3

Hatshy [7]

Answer:

False

Step-by-step explanation:

6/12 simplifies into 1/2 (six is half of twelve) and 1/2 does not equal 1/3.

You can also plug this into a calculator and see that 6/12=0.5 and 1/3=0.333

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2 years ago

This question has 2 parts.

Liula [17]

Answer:

um well i can do part A

Step-by-step explanation:

its 6/24 which equals 1/4 yards

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3 years ago

Evan can do one sit-up every 5 seconds. How many minutes will it take him to do 24 sit-ups ?

dalvyx [7]

Answer: 120 minutes.

not sure if im right lol brainliest or a thank u please :)) <3

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3 years ago

Read 2 more answers

Using the chart above find the total

scZoUnD [109]

I dont kno what the total is but i needed points sorry hahaha

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3 years ago

Select the expression equivalent to (-2x+8.1y)-(-9x+5.3y)​

Select the expression equivalent to (-2x+8.1y)-(-9x+5.3y)