All categories

3 years ago

Help me with these 3 questions please. aH-

Mathematics

1 answer:

Vanyuwa [196]3 years ago

3 0

Answer:

1) 2/7; 43; 3/7

2) C

3) 30; 30; 10; is not; 10; is not

Step-by-step explanation:

1) y + 4/7 = 6/7

y = 6/7 - 4/7

y = 2/7

17 + b = 60

b = 60 - 17

b = 43

6/7 = m + 3/7

m = 6/7 - 3/7

m = 3/7

2) 11.5 - x = 5.25

x = 11.5 - 5.25

x = 6.25

3) he can substitute 30 for t.

He can then multiply ⅓ by 30 to get a product of 10 (⅓ × 30 = 10).

Since 15 is not equal to 10, Harry's solution is not correct

You might be interested in

How do u make this 3/3

Mrac [35]

Answer:

6, 1, 8, -16

Step-by-step explanation:

For each input we divide it by 2 and then add 3 to get the output:

6/2+3=3+3=6

-4/2+3=-2+3=1

For each output we subtract 3 and multiply it by two to get the input:

(7-3)*2=4*2=8

(-5-3)*2=-8*2=-16

5 0

3 years ago

Jin buys 4 balls of yarn for a total of $23.78 she pays with two $20 Bill's. What is her change?

bixtya [17]

16.22 because two twenty dollar Bill's equals 40 then subtract 23.78 which equals 16.22

6 0

3 years ago

A ball is thrown into the air. The path it takes is modeled by the equation: -3t+24t = h, where t is the time in seconds and h i

astra-53 [7]

Given:

The given equation is:

$-3t^2+24t=h$

Where, t is the time in seconds and h is the height of the ball above the ground, measured in feet.

To find:

The inequality to model when the height of the ball is at least 36 feet above the ground. Then find time taken by ball to reach at or above 36 feet.

Solution:

We have,

$-3t^2+24t=h$

The height of the ball is at least 36 feet above the ground. It means $h\geq 36$ .

$-3t^2+24t\geq 36$

$-3t^2+24t-36\geq 0$

$-3(t^2-8t+12)\geq 0$

Splitting the middle term, we get

$-3(t^2-6t-2t+12)\geq 0$

$-3(t(t-6)-2(t-6))\geq 0$

$-3(t-2)(t-6)\geq 0$

The critical points are:

$-3(t-2)(t-6)=0$

$t=2,6$

These two points divide the number line in 3 intervals $(-\infty,2),(2,6),(6,\infty)$ .

Intervals Check point $-3(t-2)(t-6)\geq 0$ Result

$(-\infty,2)$ 0 $(-)(-)(-)=(-)$ False

$(2,6)$ 4 $(-)(+)(-)=+>0$ True

$(6,\infty)$ 8 $(-)(+)(+)=(-)$ False

The inequality is true for (2,6) and the sign of inequality is $\geq$ . So, the ball is above 36 feet between 2 to 6 seconds.

$6-2=4$

Therefore, the required inequality is $-3t^2+24t\geq 36$ and the ball is 36 feet above for 4 seconds.

3 0

3 years ago

You complete 40% of ur hw problems before dinner what fraction of the problems did u complete before dinner

yuradex [85]

Is there any answer choices? I believe it is 2/5

3 0

3 years ago

A hemispherical bowl is made of brass has an inner diameter 35 cm. What is the inner surface area? URGENT

Ganezh [65]

Answer:

The inner surface area of a hemispherical bowl will be: 1923.25 cm²

Step-by-step explanation:

Given

d = 35 cm

$r=\frac{d}{2}$

$=\frac{35}{2}$

$= 17.5$ cm

The inner surface area of a hemispherical bowl = 2πr²

$=2\times 3.14\times \left(17.5\right)^2$

$=6.28\:\times \:17.5^2$

$=1923.25$

Hence, the inner surface area of a hemispherical bowl will be: 1923.25 cm²

6 0

3 years ago