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Ksivusya [100]
2 years ago
9

What is the value of the expression below when Z =7 3z- 3

Mathematics
1 answer:
Serggg [28]2 years ago
7 0

Answer and explanation

as z= 7

3z -3

3(7) -3 =21-3 =18

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Write an equation for the line passing through the points (-5,15) and (20,25). Show how you found your answer.
olasank [31]

The point-slope form:

y-y_1=m(x-x_1)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (-5, 15) and (20, 25). substitute:

m=\dfrac{25-15}{20-(-5)}=\dfrac{10}{25}=\dfrac{2}{5}\\\\y-15=\dfrac{2}{5}(x-(-5))\\\\y-15=\dfrac{2}{5}(x+5)\qquad|\text{use distributive property}\\\\y-15=\dfrac{2}{5}x+2\qquad|\text{add 15 from both sides}\\\\y=\dfrac{2}{5}x+17\qquad|\text{multiply both sides by 5}\\\\5y=2x+85\qquad|\text{subtract 2x from both sides}\\\\-2x+5y=85\qquad|\text{change the signs}\\\\2x-5y=-85

Answer:

point-slope form: y-15=\dfrac{2}{5}(x+5)

slope-intercept form: y=\dfrac{2}{5}x+17

standard form: 2x-5y=-85

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3 years ago
Identify the pair of angles as complementary, supplementary, or neither.
fiasKO [112]
B. complementary because 126+54= 180°
8 0
3 years ago
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Write 0.000700804 in scientific notation please
klasskru [66]

Multiply the 0.00070080 by 10, 4 times, making it a 7.008. When you multiply each time by 10 it moves the decimal point to the right one time. To keep the number the same you put x10 to the 4th power next to the 7.008. This makes your answer 7.008x10 to the negative 4th power.

Hope I could help! :)


5 0
3 years ago
Karen has 4h storybooks. Karen's storybook collection is 2/3 of what Mary's collection is. How many storybooks do they have in a
dedylja [7]
If half of Karen's collection (4) is 1/3 of Mary's, and half of Karen's collection is 2, then 2 x 3 is how many Mary has, right? Once you know how many books Mary has, you can add how many Karen has to get your answer.
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the scale on a map is 0.5 centimeter = 3 kilometers. on the map, town B is 12.5 centimeters away from town A. what is the actual
Nitella [24]

Answer:

75 kilometers.

Step-by-step explanation:

It is 75 because 0.5 goes into 12.5 25 times. 25 x 3 = 75.

That is why the answer is 75. Have a gr8 day (:

(Can I have brainliest?)

8 0
3 years ago
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