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lesya [120]
3 years ago
15

Select the correct answer.

Mathematics
2 answers:
erica [24]3 years ago
4 0

Answer:

691,255(0.985)t ≤ 621,859; t ≥ 7

Step-by-step explanation:

i just did it. it was C

Rudiy273 years ago
4 0

Answer:

Yes it is corect,

C

Step-by-step explanation:

You might be interested in
In each part that​ follows, you are given an equation of a line and a point. Find the equation of the line through the given poi
Semmy [17]

Answer:

a) y=-\frac{1}{9}x

b)y-2=-\frac{1}{3} (x-1)

Step-by-step explanation:

We can write the equation of a line in 3 different forms including slope intercept, point-slope, and standard depending on the information we have. We have a point given and a slope from the equation. We will chose point-slope since we have a point and can find the slope.

Point slope:y-y_1=m(x-x_1)

a) m\neq 9 in our new equation because it is perpendicular to it. This means we will need to change it into its negative reciprocal which is m=-\frac{1}{9}.

We will substitute m=-\frac{1}{9} and x_1=0\\y_1=0.

y-0=-\frac{1}{9} (x-0)

This simplifies to:

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

b) The equation y=3x+4 follows y=mx+b. For the perpendicular line, m\neq 3. We will need to change it into its negative reciprocal which is m=-\frac{1}{3}.

We will substitute m=-\frac{1}{3} and x_1=1\\y_1=2.

y-2=-\frac{1}{3} (x-1)


4 0
3 years ago
1.
Anna007 [38]

Answer:

1) The correct option is C. (2) The correct option is D. (3) The correct option is B. (4) The correct option is D. (5) The correct option is D.

Step-by-step explanation:

The slope formula is

m=\frac{y_2-y_1}{x_2-x_1}

(1)

Two points are (-2,5) and (1,4).

m=\frac{4-5}{1-(-2)}=\frac{-1}{3}tex]Therefore option C is correct.(2)Use the above mentioned formula for each pair of coordinates.[tex]m=\frac{10-13}{17-12}=\frac{-3}{5}

m=\frac{10-15}{13-16}=\frac{-5}{-3}=\frac{5}{3}

m=\frac{10-7}{3-0}=\frac{3}{3}=1

m=\frac{18-13}{8-11}=\frac{5}{-3}=\frac{-5}{3}

Therefore option D is correct.

(3)

The pair of points (6, y) and (10, -1). The slope is \frac{1}{4}.

\frac{1}{4}=\frac{-1-y}{10-6}

\frac{1}{4}=\frac{-1-y}{4}

1=-1-y

y=-2

Therefore option B is correct.

(4)

For vertical line the x coordinates always remains the same. Therefore when we subtract the same number we get zero in the denominator, therefore the value of slope is undefined for a vertical line.

Therefore option D is correct.

(5)

Two points from the table are (2,110) and (3,165).

m=\frac{165-110}{3-2}=\frac{55}{1}

Therefore option D is correct.

5 0
3 years ago
Read 2 more answers
Solve all:<br><br> 2/3x+15=7<br><br> 3x+8-x=7<br><br> 4(2x-6)=2
Sonja [21]

Answer:

-1.3333

-1/2

3.25

Step-by-step explanation:

Ion need an explanation

8 0
3 years ago
What is the midpoint of the line segment that has endpoints (3,8) and (1,−4) ?
bezimeni [28]

Answer:

D

Step-by-step explanation:

<em>Midpoint Formula:</em>

\frac{x_{1}+x_{2}}{2}, \frac{y_{1}+y_{2}}{2}

\frac{3+1}{2} ⇒ \frac{4}{2} ⇒ 2

\frac{8+-4}{2} ⇒ \frac{8-4}{2} ⇒ \frac{4}{2} ⇒2

(2,2)

8 0
3 years ago
Which operation should you perform first in the expression 7 × 23?
Levart [38]

Answer:multiplication

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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