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Firdavs [7]
3 years ago
15

Melissa bought 3 loaves of freshly baked bread at a specialty bread shop. She paid twice as much for the whole grain bread as fo

r the French bread, and $2.50 more for the cinnamon raisin bread than for the whole grain bread. She spent a total of $11.25 for the 3 loaves. If f represents the price of a loaf of French bread, which equation describes this situation?
A. f + f + ( f + 2.50 ) + 11.25
B. f + 2f + ( f + 2.50 ) + 11.25
C. 2f + 2.50 = 11.25
D. f + 2f + ( 2f + 2.5 ) = 11.25
Mathematics
1 answer:
Ivahew [28]3 years ago
6 0

Answer:

B

Step-by-step explanation:

The first f is the price of the french bread, the 2f is the price of the whole grain(twice that of the french) and f+$2.50 is the cost of the cinnamon raisin ($2.50 more than the french)

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Two of the golf scores at the local tournament were unreadable, but the mean score was 85 and the lowest score was 75. if the re
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Step-by-step explanation:

Assuming the readable scores are:

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We know the mean (or average) is 85, so:

85 = (100 + 82 + 95 + x + 90 + 81 + 75 + 83 + y) / 9

765 = 606 + x + y

159 = x + y

We know the lowest score is 75, so x and y must be at least 76.  Possible answers are:

76 and 83

77 and 82

78 and 81

79 and 80

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6 0
3 years ago
A police officer claims that the proportion of accidents that occur in the daytime (versus nighttime) at a certain intersection
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Answer: -1.78

Step-by-step explanation:

As per given description, we have

Population proportion : p=0.35

Sample size : n= 500

Sample proportion : \hat{p}=\dfrac{156}{500}=0.312

Test statistic for population proportion :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\\\=\dfrac{0.312-0.35}{\sqrt{\dfrac{0.35(1-0.35)}{500}}}\\\\=-1.78146747757\ \ \text{(Simplified)}\\\\\approx-1.78

Hence, the test statistic for this hypothesis test for a proportion= -1.78

3 0
3 years ago
The null space for the matrix is spanned by the vector:_______
mafiozo [28]

Answer:

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Step-by-step explanation:

The null space of matrix is set of all solutions to matrix. The linearly independent vectors forms subset which are spanned and forms the null space. The null space of vector can be found by reducing its echelon. The non zero rows formed are the null spaces of matrix.

8 0
3 years ago
If x2+y2 = 12 and x2-y2=18, what is the value of x4-y4?
nataly862011 [7]

Answer:

Step-by-step explanation: add the equations

2x² = 30

x² = 15

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1 year ago
How do you solve this problem?
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