MATHEMATICS HIGH SCHOOL

Can you plz help me on this?

Answers

Answer 1

Answer:

Answer:

B 2x-31 = -2x-31

Step-by-step explanation:

A is exactly the same on the left side as the right so it has infinite solutions

B 2x-31 = -2x-31

Add 2x on each side

2x+2x-31 = -2x+2x-31

4x -31 = 31

Add 31

4x =62

This has one solution

C 2x+31 = 2x-31

Subtract 2x from each side

31 = -31

This is never true so it has no solutions

D 2x-2 = 2x-31

Subtract 2x from each side

-2 = -31

This is never true so it has no solutions

Answer 2

Answer:

Step-by-step explanation:

2x - 31 = -2x - 31

4x = 0

x = 0

x = 0 is the only solution

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Solve picture question. Mathematics.
Christina is planning a dance routine. at the end of each measure of music, she will make a 1 1/4 turn. how many turns will she make after the first 3 measures of music
A bike rental company charges $50 for the first hour, and $25 for each additional hour. Michael must spend no more than $200 on his bike rental for the day. What is the maximum number of hours that Michael can rent a bike?A) 3 hours B) 4 hours C) 5 hours D) 7 hours
Copy and complete the table below by substituting values for x into the expressions 9+ x and 2x. Use your table to work out the largest whole number x could be so that 9+ x is larger than 2x. x 0 1 2 3 4 5 7 9 10 9+x 9 10 11 12 2x 0 2 4 6
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There are 7 colors on a color wheel . you have 25 spins to get blue. after 24 spins, you have not been successful . what is the likelihood that you will succeed on the next spin?a) 1/25
b) 1/7
c) 24/25
d) 3/4

Answers

b) 1/7 because no matter how many times you spin the odds are always 1 out of all 7 of the colors

The weights of 1,000 men in a certain town follow a normal distribution with a mean of 150 pounds and a standard deviation of 15 pounds.From the data, we can conclude that the number of men weighing more than 165 pounds is about , and the number of men weighing less than 135 pounds is about .

Answers

z = ( 135 - μ ) / σ = -1
z = ( 165 - μ ) / σ = 1
P (x < 135) = P (z < -1) = 0.1587
P (165 < x) = P (1 < z) = 0.1587
.187 * 1000 = 187 more than 165
.187 * 1000 = 187 less than 135

Answer:

z = ( 135 - μ ) / σ = -1

z = ( 165 - μ ) / σ = 1

P (x < 135) = P (z < -1) = 0.1587

P (165 < x) = P (1 < z) = 0.1587

.187 * 1000 = 187 more than 165

.187 * 1000 = 187 less than 135

1000 / 187 =5.34

5.34%

Step-by-step explanation:

Please can you check my answerYou originally draw a design for an art contest on a 4 in. x 5 in. card. The second phase of the contest requires the drawing to be transferred to an 8.5 in x 11 in. standard sheet of paper and utilize as much of the space on the paper as possible. You determine that the largest size one of the dimensions of your drawing can be is 10.5 in. What is the length of the other dimension if the two drawings are similar? Type your exact answer in the blank without the units, and round to the nearest tenths.

Are the following figures similar?

Rectangles ABCD and EFGH are shown. BC equals 50, CD equals 20, FG equals 42, GH equals 12. Angles ABC, EFG, BCD and FGH are marked congruent.

a) Yes; the corresponding angles are congruent.

b) No; the corresponding angles are not congruent.

c) Yes; the corresponding sides are proportional.

d) No; the corresponding sides are not proportional.

Answers

1. I got 10..what did you get?
2.a)yes, b)no, c)yes, d)no. -I'd say you did good..

Answer:

the answer is 1.0 i believe

Suppose you invest $580 at 10% compounded continuously , write an exponential function to model the amount in your investment account ?

Answers

Interest=percent times rate(in years) times principal.
Or I=PRT
So you invest $580 so I=$580 Rate would be .10 and time would be 1 for one year. So if you put this into the formula you get
$580=P(.65)(1)
So $580=.65P so $580/.65=P so P is approximately $892.31 per year.

Write the equation of a line that isperpendicular to y = -2/3x - 4 and
passes through the point (0, 0).

Answers

Answer:

y=3/2

Step-by-step explanation:

This line's slope is perpendicular to -2/3 and its y intercept is 0.

The perimeter of a rectangle is 30 cm. The width of the rectangle is 7 cmWhat is the area of the rectangle?

A) 56 cm

B) 49 cm

C) 14 cm

Answers

Let's say the length of the rectangle is L.

We have P= (L+W)*2
⇒ 30 cm= (L+ 7 cm)*2
⇒ L+ 7 cm= 15 cm
⇒ L= 8 cm.

S= L*W= 8 cm* 7 cm= 56 cm^2.

The answer is A) 56 cm^2.

Hope this helps~

perimeter = 2(l+w)
30 = 2(l+7)
30 = 2l + 14
30 - 14 = 2l
16 = 2l
8 = l

l = 8
w = 7

area = l x w = 8 x 7 = 56 cm²

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