All categories

3 years ago

How to solve -3z+1=7

Mathematics

2 answers:

Alenkasestr [34]3 years ago

6 0

Answer: z = -2

Step-by-step explanation:

The goal is to get the variable "z" alone, so we have to simplify it. You subtract 1 from each side, making the left side read "-3z" and the right simply have 6. You then have to get rid of the coefficient, which is the number that your variable (z) is being multiplied by. So you then divide each side by -3. You will be left with "z = -2" because 6 divided by -3 is equal to -2.

Svetllana [295]3 years ago

4 0

Answer:

Step-by-step explanation:

Subtract 1 from 7, and then divide 6 by 3.

You might be interested in

Jeslyn can jump 0.8 meters above the ground. Vianna can jump 80 cm above the ground. Who can jump higher? How do you know?

Marina86 [1]

Answer:

They jump at the same height.

Step-by-step explanation:

.8 meters=2.62467 ft

80cm=2.62467 ft

8 0

3 years ago

Shakeela is planning to buy a pair of pants that have an original price of $51. The pants are on sale for 50% off and the sales

Mila [183]

Answer:

C) $25 + $1.25

Step-by-step explanation:

1. 51 x .5 = 25.5

2. 25.5 x .05 = 1.275

25 + 1.25 ≈ 25.5 + 1.28

6 0

3 years ago

If f(x) = <img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B9%7D" id="TexFormula1" title="\frac{1}{9}" alt="\frac{1}{9}" align=

boyakko [2]

Answer:

Solution given:

f(x) = $\frac{1}{9}$ x-2

let f(x)=y

y = $\frac{1}{9}$ x-2

interchanging role of x and y

x= $\frac{1}{9}$ y-2

x+2= $\frac{1}{9}$ y

y=9(x+2)

y=9x+18

F-¹(x)=9x+18

and

F-¹(-1)=9*-1+18=-9+18=9

6 0

3 years ago

0.3% of a country has a certain disease. The test for the disease has a sensitivity of 92% (i.e., of those we know have the dise

butalik [34]

Answer:

0.95988 (Accuracy of the test )

Step-by-step explanation:

To determine the accuracy of this test we have to list out the given values

Prevalence rate of the disease = 0.3% = 0.003

sensitivity rate of the disease = 92% = 0.92

specificity rate for the test = 96% = 0.96

The accuracy of the test can be found using this equation

Accuracy = sensitivity * prevalence + specificity ( 1 - prevalence )

= 0.92 * 0.003 + 0.96 ( 1 - 0.003 )

= 0.00276 + 0.95712

= 0.95988

6 0

3 years ago

Write an equation in point-slope form for the line through the given point with the given slope.

zlopas [31]

Answer:

y+1 = -1(x+10)

Step-by-step explanation:

The point slope equation of a line is

y-y1 = m(x-x1) where m is the slope and (x1, y1) is a point on the line

y - -1 = -1 (x --10)

y+1 = -1(x+10)

8 0

3 years ago

Read 2 more answers