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3 years ago

15.5z = −77.5 ? What does the z stand for? (Show all work if possible!!) Thank you

Mathematics

2 answers:

musickatia [10]3 years ago

7 0

Answer:

15.5z=-77.5

add 77.5 and you’ll get 93z z=93

Step-by-step explanation:

if the z is with a number than that’s the answer

MissTica3 years ago

6 0

im done with dis

Step-by-step explanation:

You might be interested in

Suppose you're hiring a new worker for your business. You'd like someone reliable. Suppose you use administer a test to job-seek

stiks02 [169]

Answer:

You will have 21 positive results.

Step-by-step explanation:

Sensitivity of test:

Is the true positive rate, that is, the proportion of positive results that give positive tests.

Specificity of test:

True negative rate, that is, the proportion of negative results that give negative tests.

90% sensitive, 20 reliable people apply

0.9*20 = 18

95% specific, 60 unreliable people apply

1 - 0.95 = 0.05 of positive results.

0.05*60 = 3

How many positive results will you have?

18 + 3 = 21

You will have 21 positive results.

5 0

2 years ago

a new car that costs $17,500 loses 25 percent ot its value in the first year.how much is the loss of the value?

earnstyle [38]

Answer:

4,375

Step-by-step explanation:

17,500×.25= 4,375

4 0

3 years ago

What is the length of the segment XY?

Lemur [1.5K]

Answer:

xy = 12

Step-by-step explanation:

The Trapezoid Midsegment Theorem states that a line segment connecting the midpoints of the legs of the trapezoid is parallel to the bases, and equal to half their sum.

xy = (8 + 16)/2

xy = 24/2

xy = 12

8 0

3 years ago

Sally, John & Mary had a discussion about Quadrilateral PQRS. Sally claimed that the figure represents an isosceles trapezoi

Kobotan [32]

Answer:

Step-by-step explanation:

Find the lenghth of the left and right sides using the distance formula to determine if the trapeziod is isosceles

$d=\sqrt{(x_{2}-x_{1})^{2} +(y_{2}-y_{1})^{2}$

$PS=\sqrt{(2-1)^2+(0-4)^2}$

$PS=$ $\sqrt{17}$

$QR=\sqrt{(13-9)^{2}+(8-10)^{2}}$

$QR=$ $\sqrt{20}$

Since $PS\neq QR$ (the sides are not equal) this is not an isosceles trapezoid

Sally is incorrect and John is possibly correct.

Find the slope of the top and bottom sides to determine if this is a trapezoid.

$m=$ $\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

SR: $m=$ $\frac{0-8}{2-13}$

$m=\frac{8}{11}$

PQ: $m=\frac{4-10}{1-9}$

$m=\frac{6}{8}=\frac{3}{4}$

since $mSR\neq mPQ$ (the slopes are not equal) the top and bottom sides are not parallel therefore this is not a trapezoid. Hence, John is incorrect, and Mary is ultimately correct.

5 0

3 years ago

Find the missing side of the triangle. <br> Solve for X

mr Goodwill [35]

Answer:

11.18 or 11 yards

Step-by-step explanation:

15² - 10² = x²

225 - 100 = x

225 - 100 = 125

√125 = 11.180339887498948482045868343656

11.180339887498948482045868343656 rounded to the nearest hundredth is 11.18; to the nearest tenth is 11.2; and to the nearest one is 11.

8 0

2 years ago