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Alex_Xolod [135]
2 years ago
10

Can someone pls tell me what 3/7 times negative 9/5

Mathematics
1 answer:
Alexxandr [17]2 years ago
4 0

Answer:

-27/35, and the decimal answer -0.77142857142

Step-by-step explanation:

multiply the fractions- 3 x 9 equals 27, 7 x 5 equals 35. The answer is negative.

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Two-thirds of a number is equal to 20. What is the number?
IRISSAK [1]

Answer:

The number is 30

Step-by-step explanation:

Let x be the number

2/3 x = 20

Multiply each side by 3/2 to isolate x

3/2 *2/3x = 20*3/2

x = 30

4 0
3 years ago
what is the answer to if i have four pizzas and its six friends they all het six pizza will it be enough for all of his friends
qwelly [4]
Yes,because 4* 8=36 slices and so 6*6=36 total.
8 0
2 years ago
The curved surface area of a cylinder is 880cm2 and its volume is 770cm3.Find its diameter and height.
natima [27]

Answer:

The height of cylinder is: h = 80.07 cm

The diameter of cylinder is: d = 3.5 cm

Step-by-step explanation:

Curved surface area of cylinder = 880 cm^2

Volume of cylinder = 770 cm^3

We need to find its diameter and height.

The formula used are:

Curved\: surface\: area=2\pi rh\\Volume=\pi r^2h

If we divide volume by curved surface, we can find radius

\frac{Volume}{Curved\: surface\: area}=\frac{\pi r^2h}{2\pi rh}  \\\frac{770}{880}=\frac{r}{2}\\0.875=  \frac{r}{2}\\=> r= 0.875\times 2\\r=1.75

So, we get radius r = 1.75

Now, we can find height using curve surface area formula:

Curved\: surface\: area=2\pi rh\\880=2(3.14)(1.75)h\\h=\frac{880}{10.99}\\h=80.07 \:cm

So, the height of cylinder is: h=80.07 cm

Now finding diameter using formula: d=2r

Putting value of r in above formula:

d=2r\\d=2(1.75)\\d=3.5\:cm\\

So, the diameter of cylinder is: d = 3.5 cm

5 0
3 years ago
WILL GIVE BRAINLIEST AND 10 POINTS!!! Please help me fast!!
Aleonysh [2.5K]

Answer:

3 kg of copper,

1.25 kg of nickel,

0.75 kg of zinc.

Step-by-step explanation:

i'm assuming you copied the question wrong and that the right metals are, copper, nickel* and zinc.

here's an explanation~

copper ; 12 x 1/4 = 3 kg

nickel ; 5 x 1/4 = 1.25 kg

zinc ; 3 x 1/4 = 0.75 kg

i hope this was helpful! <3

6 0
2 years ago
Read 2 more answers
What would x=? Alternate Exterior &amp; Interior Angles, 8th grade math! Help would be appreciated &lt;3
diamong [38]

Answer:

x = 4

Step-by-step explanation:

From the picture attached,

Two parallel lines with a transversal line intersecting these parallel lines at two distinct points.

Angles measuring 36° and (8x + 4)° are Alternate interior angles.

Therefore, measure of these angles will be equal.

(8x + 4)° = 36°

(8x + 4) - 4 = 36 - 4

8x = 32

x = 4

6 0
3 years ago
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