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professor190 [17]
2 years ago
10

Factorise fully 21x² +25x =4​

Mathematics
1 answer:
Vitek1552 [10]2 years ago
6 0
X= 1/7, -4/3
________
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Sara uses 7.6 pints of blue paint and white paint to paint her bedroom walls. 3 4 of this amount is blue paint, and the rest is
labwork [276]

Answer:

1.9

Step-by-step explanation:

7.6/4= 1.9

1.9*1= 1.9

ans is 1.9 pints

4 0
3 years ago
No work needs to be shown. just please help.
coldgirl [10]

Answer:

a=13

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Step-by-step explanation:

4 0
3 years ago
A(x) = -0.015x^3+1.05xA ( x ) = − 0.015 x 3 + 1.05 x gives the alcohol level in an average person's blood x hrs after drinking 8
goldfiish [28.3K]

Answer:

Yes

Step-by-step explanation:

the function that gives the alcohol level is:

A ( x ) = - 0.015 x^3 + 1.05 x

where x is the number of hours.

we need to know if after 4 hours an average person is legally drunk, thus:

x=4

and we substitute this in the function:

A ( 4 ) = - 0.015 (4)^ 3 + 1.05(4)

solving these operations we obtain:

A(4)=-0.015(64)+4.2\\A(4)=-0.96+4.2

A(4)=3.24

the alcohol level after 4 hours is 3.24.

Since a person is considered to be legally drunk if the level exceeds 1.5, and we obtained 3.24 which is greater than 1.5, a person who has been drinking for 4 hours under the conditions indicated by the problem would be considered legally drunk.

5 0
3 years ago
Find the product write the product as a mixed number
Helga [31]

Answer:

\frac{9}{10}  \times 54 =  \frac{9 \times 54}{10}  =  \frac{486}{10}  = 48 \frac{6}{10}  =  \frac{243}{5}

3 0
3 years ago
Surface area of a triangular prism
iragen [17]

Answer:

96

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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