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Gemiola [76]
3 years ago
7

Please help fast for 10 points and brainlist!! And it’s multiple choice!!! ANSWER ONLY IF YOU KNOW!! PLEASE EXPLAIN PREFER AND E

XPERT OR ABOVE

Mathematics
1 answer:
kari74 [83]3 years ago
4 0

Answer:

C. 4yd * 3ft/yd * 12in/1ft * 2.54cm/1.in = 365.76cm

Step-by-step explanation:

First you change 4 yards into feet (By multiplying the 4 yard by 3 ft/1yd)

then you convert 12 feet into inches (By multiplying the 12 feet by 12in/1ft)

after you convert 144 inches to cm (By multiplying the 144 in by 2.54 cm/1in)

you’ll have the value in cm. Which is 365.76.

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A dance floor is shaped like a square with an area of 196 square feet. Find the length of one side of the dance floor.
GenaCL600 [577]
Since it's a square, the sides are all the same. This is going to be the equation.
S²=196
14×14=196
The length of one side is 14.
4 0
3 years ago
High grade steel consists of 85% iron and 15% magnese. Low grade steel consists of 67% iron and 33% mag ese. NASA orders 500 ton
Mamont248 [21]

Answer:

361\dfrac{1}{9} tons of high steel and 138\dfrac{8}{9} tons of low steel

Step-by-step explanation:

Let x be the number of tons of high grade steel and y be the number of tons ow low grade steel needed.

In x tons of high grade steel there are

0.85x tons of iron

0.15x tons of magnese

In y tons of low grade steel there are

0.67y tons of iron

0.33y tons of magnese

NASA orders 500 tons of steel, so

x+y=500

and specifies that it must be in the proportion 80% iron and 20% magnese, so

0.85x+0.67y=500\cdot 0.8\\ \\0.85x+0.67y=400

From the first equation,

x=500-y

Substitute it into the second equation:

0.85(500-y)+0.67y=400\\ \\425-0.85y+0.67y=400\\ \\-0.18y=-25\\ \\y=\dfrac{2,500}{18}=138\dfrac{8}{9}\ tons\\ \\x=361\dfrac{1}{9}\ tons

7 0
4 years ago
Write 9 decimals with one decimal place that when rounded to the nearest one round to 7
FinnZ [79.3K]
7.030124314  they all just have to be less then 5
8 0
4 years ago
Read 2 more answers
What would be 12% of 40
weeeeeb [17]

Hello,

Answer:

4,8

Step-by-step explanation:

<u>what would be 12% of 40 ? </u>

12% × 40 = 12/100 × 40 = 0,12 × 40 = 4,8

3 0
2 years ago
Me pueden ayudar a saber el resultado y la operacion de la ecuacion 8-5x=8+2x por favor me urge
Art [367]
Solve for x:
8 - 5 x = 2 x + 8
Subtract 2 x from both sides:
8 + (-5 x - 2 x) = (2 x - 2 x) + 8
-5 x - 2 x = -7 x:
-7 x + 8 = (2 x - 2 x) + 8
2 x - 2 x = 0:
8 - 7 x = 8
Subtract 8 from both sides:
(8 - 8) - 7 x = 8 - 8
8 - 8 = 0:
-7 x = 8 - 8
8 - 8 = 0:
-7 x = 0
Divide both sides of -7 x = 0 by -7:
(-7 x)/(-7) = 0/(-7)
(-7)/(-7) = 1:
x = 0/(-7)
0/(-7) = 0:
Answer: x = 0
6 0
3 years ago
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