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Murrr4er [49]
3 years ago
11

Please help with this I don’t understand

Mathematics
1 answer:
Levart [38]3 years ago
3 0
2.6 2.5 5.8 yep that's how u do it lol
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Francesca had 20 dollars to spend on 3 gifts. She spent 8 1 4 dollars on gift A and 4 4 5 dollars on gift B. How much money did
Karo-lina-s [1.5K]

Answer:

Francesca had \$\frac{139}{20} \ \ OR \ \ \$6\frac{19}{20} money left for gift C.

Step-by-step explanation:

Given:

Total money to spent on gift = $20

Money Spent on gift A = \$ 8\frac{1}{4}

\$ 8\frac{1}{4} can Rewritten as  \$\frac{33}{4}

Money Spent on gift A = \$\frac{33}{4}

Money Spent on gift B = \$ 4\frac{4}{5}

\$ 4\frac{4}{5} can Rewritten as  \$\frac{24}{5}

Money Spent on gift B = \$\frac{24}{5}

We need To find the Money left for gift C.

Solution:

Money left for gift C can be calculated by subtracting Money Spent on gift A and Money Spent on gift B with Total Money spent on gifts.

Framing in equation form we get;

Money left for gift C = 20-\frac{33}{4}-\frac{24}{5}

Now taking LCM for making the denominator common we get;

Money left for gift C =\frac{20\times 20}{20}-\frac{33\times5}{4\times5}-\frac{24\times4}{5\times4}= \frac{400}{20}-\frac{165}{20}-\frac{96}{20}=\frac{400-165-96}{20} = \$\frac{139}{20} \ \ OR \ \ \$6\frac{19}{20}

Hence Francesca had \$\frac{139}{20} \ \ OR \ \ \$6\frac{19}{20} money left for gift C.

8 0
3 years ago
an electrician charges a set fee of $150 for every house call and then charges an additional $70 per hour. write an equation for
Artyom0805 [142]

Answer:

y = 70x + 150

Step-by-step explanation:

y-intercept: 150

slope: 70x

Let x represent the amount of hours the electrician spent in the house.

4 0
2 years ago
Read 2 more answers
How to find zeroes in intercept form y=4x^2-19x-5
Sliva [168]
I hope this helps you



y= 4x^2-19x-5


4x +1


x -5


y=(4x+1). (x-5)



4x+1=0 4x= -1 x= -1/4


x-5=0 x= 5
3 0
3 years ago
If the product of x^2a-1/y^3b+4 and x^7b-4/y^10-a is x^24/y^19 find the value of a and b
lidiya [134]

Answer:

a = 4; b = 3

Step-by-step explanation:

For the question to make any sense, we need to add parentheses.

... x^(2a-1)/y^(3b+4) × x^(7b-4)/y^(10-a) = x^24/y^19

Equating exponents, we have ...

... (2a-1) + (7b-4) = 24 . . . . exponent of x in the product

... (3b+4) + (10 -a) = 19 . . . exponent of y in the product

Simplifying these two equations, we get

... 2a +7b = 29

... a -3b = -5

By Cramer's rule, ...

... a = (7·(-5) -(-3·29)/(7·1 -(-3·2)) = 52/13 = 4

... b = (29·1 -(-5·2))/13 = 39/13 = 3

_____

<em>More about Cramer's Rule</em>

If you have the linear equations ...

  • ax +by = c
  • dx +ey = f

The solutions for the variables x and y can be found directly from the equation coefficients as ...

... x = (bf -ec)/(bd -ea)

... y = (cd -fa)/(bd -ea) . . . . same denominator as for the first equation

Once you recognize the pattern in the products, the formula is not difficult to remember.

___

This is actually the Vedic math version of Cramer's rule. It differs from the usual presentation of Cramer's rule in that both numerator and denominator are negated. This makes the pattern of products easier to remember and gives exactly the same result.

6 0
3 years ago
Consider the probability that no fewer than 74 out of 112 houses will lose power once a year. Assume the probability that a give
Natasha_Volkova [10]

Answer: the normal curve can be used as an  approximation to the binomial probability considering the following condition: when the sample is large, in this case n=112

Step-by-step explanation:

for a binomial experiment to be approximated to normal distribution, the following conditions must be present:

i.  sample size must be large, in this case sample size is 112

ii.  the mean must be equal to np,where n is sample size and p is probability  of success

iii.  the standard deviation must be equal to npq,where q is the probability of failure

5 0
3 years ago
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