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raketka [301]
3 years ago
12

Using compatible numbers, which is the best estimate of (28.5)(7.1)? 36 40 210 300

Mathematics
1 answer:
kifflom [539]3 years ago
7 0

Answer:

210

Step-by-step explanation:

29*7 = 203, 203 is the closest number to 210!

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(2
a_sh-v [17]

Answer:

The equation is,

(x+1)^{2} \times (x+2) = 0

Step-by-step explanation:

According to the question, the equation is cubic and have roots -1 (with multiplicity of 2) and -2.

So, the equation is,

(x+1)^{2} \times (x+2) = 0

[Since, when a , b , c are the roots of a cubic equation, the equation is

given by (x-a) \times (x-b) \times (x-c) = 0 ]

3 0
3 years ago
Leilani practiced piano for 3/5 of an hour. Sarah practiced piano for 7/8 of an hour.
ivolga24 [154]

Answer:

The number of hours did Sarah practice more than Leilani is \dfrac{11}{40}  hours  .

Step-by-step explanation:

Given as :

The time for which Leilani practiced piano = \dfrac{3}{5} hours

The time for which Sarah practiced piano = \dfrac{7}{8} hours

Let the number of hours did Sarah practice more than Leilani = T hours

<u>Now, According to question</u>

The number of hours did Sarah practice more than Leilani = \dfrac{7}{8} hours -  \dfrac{3}{5} hours

Or, T =  \dfrac{35-24}{40} hours

Or, T =  \dfrac{11}{40} hours

So,The number of hours did Sarah practice more than Leilani = T =  \dfrac{11}{40}  hours

Hence, The number of hours did Sarah practice more than Leilani is \dfrac{11}{40}  hours  . Answer

3 0
3 years ago
Solve this system of equations: y = 7; y = -2x+1 *
Gnoma [55]

Answer:

x = -3

y = 7

Step-by-step explanation:

y = -2x + 1

7 = -2x + 1

<u>-1           -1 </u>

6 = -2x

divide by -2

x = -3

6 0
3 years ago
Read 2 more answers
Amy and Beth share some money in the ratio 3:5.
o-na [289]
Ans: £12 hope it helps

8 0
3 years ago
Read 2 more answers
Given f(x)=x-10. what is f(-7)
Vlad [161]
f( - 7) = ( - 7) - 10 \\ = -1 7
answer is -17
5 0
3 years ago
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