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algol [13]
3 years ago
12

Concrete is made by mixing screenings cement and sand in the ratio 3:1:15. How much sand would be needed to make 125 tons of con

crete?
Mathematics
1 answer:
alekssr [168]3 years ago
7 0

Answer:

=    98.7 tons

Step-by-step explanation:

ratio =   3:1:15

amount of sand needed =    (15/19)*125      /  3 + 1 +15  =19

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Eric and Sue will randomly select from a treat bag containing 3 lollipops and 2 gum balls. Eric will select, replace it, and the
Vilka [71]

Answer:

Sue has the greater probability of 2/5 and Eric has the probability of 1/5.

Step-by-step explanation:

Sue took 2 things and eric replaced his forst one, ending up with one treat.

8 0
3 years ago
Without his pencil or calculator, Joey knows that 2x³+3x²− 1 = 0 has at least one real solution. How does he know?
vova2212 [387]

Answer: Find the discriminant

Check explanation

Step-by-step explanation:

b^2-4ac

if it is equal to 0 there is no solution

Greater then 0 there is 2 real solution

Less then 0 there is 1 real

3^2-4(2*-1)

9-4(-2)

9(8)

72 there is at least one real solution

6 0
3 years ago
Simplify.<br><br> (4w + 3) – 2w + 7<br><br> 2w + 10<br> 2w - 10<br> 6w + 10<br> 6w - 10
7nadin3 [17]
Hey there,

2w+10 would be the best choice here.
Sorry if I'm wrong, good luck!

:)
3 0
3 years ago
Can someone help me? ​
IrinaK [193]

Answer:

I figure you could simplify it by multiplying both sides by 6, resulting in -31+23=-30+18-1+5

-8=-8

Step-by-step explanation:

6 0
2 years ago
Simplify the expression. (p^9)^−2
EastWind [94]
<span><span> p9/p3</span> </span>Final result :<span> p6 </span>Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "p3"   was replaced by   "p^3".  1 more similar replacement(s).

Step by step solution :<span>Step  1  :</span><span> p9 Simplify —— p3 </span>Dividing exponential expressions :

<span> 1.1 </span>  <span> p9</span> divided by <span>p3 = p(9 - 3) = p6</span>

Final result :<span> p<span>6</span></span>
6 0
4 years ago
Read 2 more answers
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