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Diano4ka-milaya [45]
2 years ago
10

Explain how an estimate helps you place the decimal point when multiplying 3.9 × 5.3

Mathematics
2 answers:
natali 33 [55]2 years ago
4 0
An estimate helps you because you round 3.9 to 4 and 5.3 to 5 so then you can give a rough estimation
den301095 [7]2 years ago
4 0

Answer:

3.9\times 5.3\approx 20

Step-by-step explanation:

To find : How an estimate helps you place the decimal point when multiplying 3.9\times 5.3 ?

Solution :

Estimate the number 3.9 by rounding to ones,

As tenth place 9 >5 ones place round by 1.

So, 3.9\approx 4

Estimate the number 5.3 by rounding to ones,

As tenth place 3<5 ones place remain same.

So, 5.3\approx 5

3.9\times 5.3\approx 4\times 5

3.9\times 5.3\approx 20

Therefore, 3.9\times 5.3\approx 20

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The equation for a line that passes through the point of (3, 9) and has a slope of 2 in slope intercept form is y=2x+3
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Marcus needs 3 1/10 m of blue fabric and 1 1/5 m of yellow fabric to make his costume. How much more blue fabric than yellow fab
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Answer:

1\frac{9}{10}\ m

Step-by-step explanation:

we know that

To find out how much more blue fabric than yellow fabric does Marcus need, subtract the quantity of yellow fabric from the quantity of blue fabric

step 1

Convert mixed number to an improper fraction

3\frac{1}{10}\ m=\frac{3*10+1}{10}=\frac{31}{10}\ m

1\frac{1}{5}\ m=\frac{1*5+1}{5}=\frac{6}{5}\ m

step 2

Subtract the numbers

\frac{31}{10}-\frac{6}{5}=\frac{31}{10}-\frac{12}{10}=\frac{19}{10}\ m

Convert to mixed number

\frac{19}{10}\ m=\frac{10}{10}+\frac{9}{10}=1\frac{9}{10}\ m

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2 years ago
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Answer:

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7 0
3 years ago
Helen plays basketball. For free throws, she makes the shot 78% of the time. Helen must now attempt two free throws. C = the eve
riadik2000 [5.3K]

Answer:

0.6708 or 67.08%

Step-by-step explanation:

Helen can only make both free throws if she makes the first. The probability that she makes the first free throw is P(C) = 0.78, now given that she has already made the first one, the probability that she makes the second is P(D|C) = 0.86. Therefore, the probability of Helen making both free throws is:

P(C+D) =  P(C) *P(D|C) = 0.78*0.86\\P(C+D) = 0.6708

There is a 0.6708 probability that Helen makes both free throws.

5 0
3 years ago
8. Rename the quadratic function f(x) = -2(x + 4)2 - 5 in standard form. A. f(x) = -2x2 + 16x - 37 G. f(x) = -2x2 – 16x + 27 B.
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Answer:

<em>see</em><em> </em><em>explanation</em>

Step-by-step explanation:

f(x)= -2(x²+8x+16)-5

-2 {x}^{2}  - 16x - 32 - 5 \\  f(x)= - 2 {x}^{2}  - 16x - 37

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