Kareem works mowing lawns and babysitting. He earns $8.60 an hour for mowing and $8.10 an hour for babysitting. How much will he earn for 7 hours of mowing and 5 hours of babysitting?

Answer:

0.85

Step-by-step explanation:

The Z-score for Tiffany's exam grade will be 0.85. The value of Z score for the different distribution is different.

The z-score is a numerical assessment of a value's connection to the mean of a set of values, expressed in terms of standards from the mean, that is used in statistics.

The Z score is found as;

[tex]\rm Z= \frac{x-\mu}{\sigma} \\\\ Z=\frac{80-77}{3.5} \\\\ Z=0.85[/tex]

Hence,the Z-score for Tiffany's exam grade will be 0.85.

To learn more about the Z score refer to;

https://brainly.com/question/15016913

#SPJ2

Answer:

Ummm give me a second let me solve this

Answer:

7

8

Step-by-step explanation:

The rate of change per year is the number of books she gets each year.

The problem states "She will buy 7 new puzzle of books each year."

The rate of change per year is 7.

The initial value is the beginning value.

She gets 7 book each year. In 5 years, she gets 5 * 7 = 35 books.

She will have 35 additional books in 5 years. She will have a total of 43 books in 5 years.

43 - 35 = 8

She started with 8 books.

The initial value is 8.

Answer:

The solution to the equation is x = 0.38 or -18.38

Step-by-step explanation:

x^2+18x=7 can be properly written as

[tex]x^{2} +18x =7[/tex]

To solve by completing the square, divide the coefficient of x by 2, square and then add to both sides

i.e 18/2 = 9

Then add 9² to both sides of the equation

[tex]x^{2} +18x + 9^{2} = 7 + 9^{2}[/tex]

This becomes

[tex](x+9)^{2} = 7 + 81[/tex]

[tex](x+9)^{2} = 88[/tex]

[tex]x+9 = \pm \sqrt{88}[/tex]

[tex]x = -9 \pm\sqrt{88}[/tex]

[tex]x = -9 \pm 9.38[/tex]

∴ [tex]x = -9+9.38 or -9-9.38[/tex]

[tex]x = 0.38 or -18.38[/tex]

Hence, x = 0.38 or -18.38

Answer:

42,-42

Step-by-step explanation:

We first solve for x from x^6 = 64, by taking the root of both sides, and we get x = 2,-2

We then plug in both of the x values and get 42,-42

PS: That should be the right answer but you didn't include the possible answers, and I somehow also got 30 when plugging in -2, but just try it yourself to be safe.

Answer:

[tex]k=\pm 6[/tex]

Step-by-step explanation:

The given quadratic equation is :

[tex]x^2 - kx + 8 = 0[/tex]

One of the roots of this equation is twice that of the other. Let the roots are [tex]\alpha \ and\ \beta[/tex], [tex]\alpha =2\beta[/tex]

Sum of roots, [tex]\alpha +\beta =\dfrac{-b}{a}[/tex]

[tex]\alpha +\beta =\dfrac{-(-k)}{1}\\\\\alpha +\beta =k\\\\3\beta =k\ .......(1)[/tex]

Product of roots,

[tex]\alpha \beta =\dfrac{c}{a}\\\\2\beta ^2=\dfrac{8}{1}\\\\\beta =\pm 2[/tex]

If [tex]\beta =\pm2[/tex],

[tex]k=3(2)\\\\=\pm 6[/tex]

So, the value of k is equal to [tex]\pm 6[/tex].

Answer:

m

Step-by-step explanation:

m

Answer:

Step-by-step explanation:

1.

x/50= 84/100

x= 4200/100

x= 42

Needed to score a 42/50 to get an 84%

2.

x/75 = 96/100

x= 7200/100

x= 72

Needed to score a 72/75 to get a 96%

Answer:

150°

Step-by-step explanation:

By inscribed angle theorem:

[tex]x = 2 \times 75 \degree \\ \\ x = 150 \degree[/tex]

the answer should be 16.0

Answer:

d has is the graph with the slope of 1/2.

Step-by-step explanation:

the rise over run from point to point is how you determine the slope.

i hope this helps :)

Answer:

A)

Step-by-step explanation:

n = -3

Output: (n - 2)

-3 - 2 = -5

It's A because it's the ONLY choice where the output is -5 when the input is -3

Answer:

the answer is b Both pairs are parallel to each other

Answer: its b, shawty

Step-by-step explanation:

probably

Answer:

TWO BUCKS?? ballin on a budget

anyways, if there are 16 guests, the party would cost $50. sounds a lot more correct lol

Answer:

Enjoy:)

Step-by-step explanation:

Answer:

10ft × 7ft = 70sq ft

Step-by-step explanation:

The width of the Bed is = The width of the study corner = 10ft

Answer:

LSA = (a+b+c)×h

Step-by-step explanation:

The formula that would be used to find the lateral surface area of the triangular prism = perimeter of base(P) × Height of prism(H)

Let us assume that three side of triangle are a, b, c and height of prism is h

Then lateral surface area of the prism can be LSA = (a+b+c)×h

Answer:

independent

Step-by-step explanation:

independent

Answer:

The opposite of 12 is -12.

Step-by-step explanation:

-12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

All you have to do is do the negative version of that same original number.

Answer:

4/3 or 1 1/3

Step-by-step explanation:

9514 1404 393

Answer:

  34 < x < 74

Step-by-step explanation:

Assuming we're concerned with a triangle, the third side must have a length between the difference and the sum of the two given sides.

  54 -20 < x < 54 +20

  34 < x < 74

Answer:

the sides = 6 * 10 * 2 = 120 sq meters

front & rear triangle = .5 * 8 * 5 * 2 = 40 sq meters

total fabric needed = 160 square meters

that is NOT one of your answers but I think you may not have typed it correctly.  

Step-by-step explanation:

Answer:

2 and -2

Step-by-step explanation:

Answer:

The speed is 900,000,000 km/h

Step-by-step explanation:

The ratio of distance covered to time taken gives the speed of an object

[tex]Speed, \ v = \dfrac{Distance, \ d}{Time, \ t}[/tex]

Given that the distance covered, d = 5 × 10⁵ cm

The time to travel the given distance, t = 2 × 10⁻⁵ seconds

Therefore;

[tex]Speed, \ v = \dfrac{5 \times 10^{5} \ cm}{2 \times 10^{-5} \ s} = 2.5 \times 10 ^{10} \ cm/s[/tex]

In km/h, we have;

1 cm = 0.00001 km

∴ v = 2.5 × 10¹⁰ cm/s × 1 km/(100,000 cm) × 3,600 s/h = 900,000,000 km/h

The speed is 2.5 × 10¹⁰ cm/s or 900,000,000 km/h.

Answer:

x=14 units

Step-by-step explanation:

Answer:

( x + 2 )² + ( y - 6 )² = 49

Step-by-step explanation:

→ Write the form of an equation of a circle

( x - a )² + ( y - b )² = r²

→ Substitute in the centre remembering to switch the signs

( x + 2 )² + ( y - 6 )² = r²

→ Substitute in radius

( x + 2 )² + ( y - 6 )² = 49