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Phantasy [73]
3 years ago
8

Question 11 (1 point)

Mathematics
2 answers:
SOVA2 [1]3 years ago
6 0

Answer:

Step-by-step explanation:

7x - 5 = 58

7x = 63

x = 9

a is the answer

Flura [38]3 years ago
3 0

Answer:

a (9)

add 5 to to 58 and subtract 5 from 5. then divide 63 by 7 and the answer is 9

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Choose the best description of the curve of y = a sin x for a < 0, starting at the origin and moving in the positive x direct
Sedaia [141]

Answer: Zero, minimum, Zero, Maximum, Zero

Step-by-step explanation:

That’s the answer in Edge

3 0
2 years ago
Is the line through points P(0, –9) and Q(2, –8) perpendicular to the line through points R(1, 4) and S(3, 3)? Explain
Serjik [45]
The quickest way to tell if a line is perpendicular is to find the slope, so you'll need to get the slope for both lines

PQ = ((-8) - (-9))/(2 - 0) = 1/2

and, for reference, a perpendicular slope is the negative reciprocal of the original (so we're looking for -2)

RS = (3 - 4)/(3 - 1) = -1/2

so, no, these two lines aren't perpendicular because the slope of RS is only the negative of PQ, not the negative <em>reciprocal</em>.
3 0
3 years ago
Read 2 more answers
The radius of the Moon is 1700 km, and the radius of the Earth is 6350 km. A scale model of the Earth and the Moon is made. In t
Reil [10]

Answer:

1) 12.7 cm

2) 8580.24 cm³

Step-by-step explanation:

given,

Radius of moon(Rm) = 1700 Km              Radius of Earth(Re) = 6350 km

Model radius of Moon(Mm) = 3.4 cm        

2) Volume of earth model =\dfrac{(R_e)^3}{(R_m)^3}\times \dfrac{4}{3}\pi (M_m)^3

                                       = \dfrac{(6350)^3}{(1700)^3}\times \dfrac{4}{3}\pi (3.4)^3

                                       = 8580.24 cm³

1) radius of earth = \dfrac{R_e}{R_m}\times M_m

                        =  \dfrac{6350}{1700}\times 3.4

                        = 12.7 cm

3 0
3 years ago
Frank invests $1,000 in simple interest investment account that pays 8% a year. After a number of years, he withdraws his balanc
IceJOKER [234]

Answer:

15\ years

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

A is the Final Investment Value

I is the amount of money in Interest  

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

t=?\ years\\ P=\$1,000\\ A=\$2,200\\r=0.08

<em>Find the interest I</em>

I=A-P=\$2,200-\$1,000=\$1,200

substitute in the formula above

\$1,200=\$1,000(0.08t)

Solve for t

t=1.2/0.08=15\ years

6 0
3 years ago
Read 2 more answers
A long-distance phone call between two cities costs ​$4.42 for 17 minutes. What is the rate in cents per​ minute?
Novosadov [1.4K]

Answer:

The rate is r = \frac{442}{17} = 26

Step-by-step explanation:

The rate, in cents per minute, is given by the multiplication of the how much you paid by 100 and divided by the number of minutes.

The multiplication by 100 happens because the cost is in dollars, and each dollar has 100 cents. So

r = \frac{100*4.42}{17} = \frac{442}{17} = 26

6 0
3 years ago
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