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3 years ago

What is 832.248 rounded to the nearest tenth?

1 answer:

3 0

832.2
What you do is take the 2nd number past the decimal point and if it is less than 5 you round it down if it is greater than or equal to 5 you round up.
so if the number is 10.64 you would round down to 10.6 and if the number is 13.68 you would round up to 13.7

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Solve for y 16y^2-25=0

Pepsi [2]

Answer:

$\large\boxed{x=-\dfrac{5}{4}\ \vee\ x=\dfrac{5}{4}}$

Step-by-step explanation:

$16y^2-25=0\\\\METHOD\ 1:\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\16=4^2\ \text{and}\ 25=5^2\ \text{therefore we have}\\\\4^2y^2-5^2=0\\\\(4y)^2-5^2=0\\\\(4y-5)(4y+5)+0\iff4y-5=0\ \vee\ 4y+5=0\\\\4y-5=0\qquad\text{add 5 to both sides}\\4y=5\qquad\text{divide both sides by 4}\\\boxed{y=\dfrac{5}{4}}\\\\4y+5=0\qquad\text{subtract 5 from both sides}\\4y=-5\qquad\text{divide both sides by 4}\\\boxed{x=-\dfrac{5}{4}}$

$METHOD\ 2:\\\\16y^2-25=0\qquad\text{add 25 to both sides}\\\\16y^2=25\qquad\text{divide both sides by 16}\\\\y^2=\dfrac{25}{16}\to y=\pm\sqrt{\dfrac{25}{26}}\\\\y=-\dfrac{\sqrt{25}}{\sqrt{16}}\ \vee\ x=\dfrac{\sqrt{25}}{\sqrt{16}}\\\\\boxed{y=-\dfrac{5}{4}\ \vee\ x=\dfrac{5}{4}}$

7 0

3 years ago

Read 2 more answers

Gas mileage is the number of miles you can drive on a gallon of gasoline. A test of a new car results in 630 miles on 15 gallons

Ne4ueva [31]

Answer:

2,100 miles

Step-by-step explanation:

Step 1- Find the miles the car can travel per gallon

630 miles/ 15 gallons=42 miles per gallon

Step 2- Multiply the miles per gallon by the number of gallons being used

42x50=2,100 miles

7 0

3 years ago

4x+2y=-24 -4x+y = 12

allsm [11]

Answer:

Step-by-step explanation:

4x+2y = -24 -------------(i)

-4x+y = 12 -------------(ii)

add (i) &(ii) 3y = -12

y = -12/3

y = -4

Put y = (-4) in (i)

4x + 2*(-4) = -24

4x - 8 = -24

4x = -24 + 8

4x = -16

x = -16/4

x = -4

6 0

3 years ago

X = 16 - 4y 3x + 4y =8 substitution method

8_murik_8 [283]

Answer:

i think x = -4, y = 5

Step-by-step explanation:

x = 16 - 4y

3x + 4y = 8

3(16 - 4y)+4y = 8

48-12y+4y = 8

48-8y = 8

48-8 = 8y

40 = 8y

5 = y

x = 16 - 4y

x = 16 - 4(5)

x = 16 - 20

x = -4

5 0

3 years ago

Jimmy is buying 2 pairs of pants that cost $14.50 each. There is a 7.5% sales tax What is the total Jimmy will pay for the pants

dangina [55]

Answer:

$31.18

Step-by-step explanation:

14.50 x 2 = 29

29 x 0.075 = 2.175

29 + 2.175 = 31.175

Round up to 31.18

5 0

3 years ago