Select all equations that match the tape diagram.

Answer:

[tex]7x+2y = -17[/tex]

Step-by-step explanation:

We have the following equations:

[tex]2x+3y = -5[/tex]

[tex]5x-y = -12[/tex]

If we want to add these equations, we just need to add x-terms, y-terms and independent terms.

[tex](2x+5x)+(3y-y) = -5-12[/tex]

[tex]7x+2y = -17[/tex]

I hope it helps you!

Answer:

7x + 2y = -17

Step-by-step explanation:

khan academy

y=5

x=30

Explanation: since all 3 angles of triangles are marked equal we can see that it is equilateral which means 8y=40 so y=5. Then we can find that the other triangle is an 120 30 30 triangle thus x is 30. You can also do this if you can see straight away that the big triangle is a 30-60-90 triangle and just use 90-60.

Answer:

5088

Step-by-step explanation:

212*24=5088

Answer:

42%

Step-by-step explanation

0.42 = 42/100

to find percent you need to find how much is it out of 100

42/100 = 42%. :)

Answer:

42%

Step-by-step explanation:

If you have a hard time determining how to calculate a decimal into a percentage, just move the number to places to the left.

Hope this helped!

Thanks!

Your friend in answering,

~Steve

Answer:

More

Step-by-step explanation:

If we divide 30 by .25 we will get 120

Answer:

Step-by-step explanation:

PQ=RS

x-1=3x-7

-2x=-6

x=3

So the length of PS is

x-1+x+3x-7

5x-8, since x=3

5(3)-8

15-8

PS=7

Answer:

Just please, I don't understand this at all!!!

Step-by-step explanation:

Answer:

if you're trying to find z it equals 6

Step-by-step explanation:

because 60 ÷ 10 = 6

Answer:

divide 10 from z

z is alone

now divide 10 from 60

you get 6

z=6

I kinda suck at explaining stuff but hope that helps

Answer:

your answer would be 21x-49/7x^2+4

Step-by-step explanation:

21 x -49

-----------

7x^2+4

Answer:correct

Step-by-step explanation:go to 1 then go up on the x axis and see that it goes to about three and do the same with three and you take the two y values and do the big number - the small number the do the same for x and you should get 22/2 and that makes a whole number of 12 BOOM

Answer:

turn 5-4/10 to an improper fraction so

[tex] \frac{54}{10} \times 2[/tex]

you can simply that to

[tex] \frac{54}{5} [/tex]

then change it back to a regular fraction

[tex]10 \frac{4}{5} [/tex] which is also

[tex]10 \frac{8}{10} [/tex]

Answer:

D.  10 [tex]\frac{8}{10}[/tex]

Step-by-step explanation:

54/10 x 2 = 108/10

= 10 [tex]\frac{8}{10}[/tex]

Answer:

The equation of the plane is represented by [tex]\frac{1}{18}\cdot x + \frac{1}{18}\cdot y + \frac{1}{18}\cdot z = 1[/tex].

Step-by-step explanation:

Algebraically speaking, a plane can be represented by following vectorial product:

[tex](a,b, c)\,\bullet\,(x,y,z) = 1[/tex] (1)

Where:

[tex]a[/tex], [tex]b[/tex], [tex]c[/tex] - Plane coeffcients.

[tex]x[/tex], [tex]y[/tex], [tex]z[/tex] - Coordinates.

We need three distinct points to determine all coefficients. If we know that [tex](x_{1},y_{1},z_{1}) = (0,9,9)[/tex], [tex](x_{2},y_{2}, z_{2}) = (9,0,9)[/tex] and [tex](x_{3},y_{3},z_{3}) = (9,9,0)[/tex], the system of equations to be solved is:

[tex]9\cdot b + 9\cdot c = 1[/tex] (1)

[tex]9\cdot a + 9\cdot c = 1[/tex] (2)

[tex]9\cdot a + 9\cdot b = 1[/tex] (3)

The solution of this system is [tex]a = \frac{1}{18}[/tex], [tex]b = \frac{1}{18}[/tex], [tex]c = \frac{1}{18}[/tex].

Hence, the equation of the plane is represented by [tex]\frac{1}{18}\cdot x + \frac{1}{18}\cdot y + \frac{1}{18}\cdot z = 1[/tex].

Answer:

I'm pretty sure it's 400w+5=s

Step-by-step explanation:

400w because thats how much he earns each week +5 because that's how much he added =s which equals the total cost in his savings

Answer:

1

Step-by-step explanation:

Hope this helpsss

Answer:

1

Step-by-step explanation:

The equation is 3/10 times 10/3, which is 30/30, which equals 1.

(hope this helps :P)

Answer:

a, t = (p - 4)/5

b. t =√(a + 4)

c. t = d/(5-f)

Step-by-step explanation:

a. p = 5t + 4

To make t the subject of the equation, subtract 4 from both sides

p - 4 = 5t + 4 - 4

p - 4 = 5t

Divide both sides by 5

(p - 4)/5 = t

t = (p - 4)/5

b. a = t2 - 4

to make t the subject, add 4 to both sides

a + 4 = t2 - 4 + 4

a + 4 = t2

find the root of both sides

t =√(a + 4)

c. d = t(5 – f)

to make t the subject, divide both sides by 5 - f

d/(5-f) = t(5 – f)/(5 – f)

t = d/(5-f)

Answer:

I'm sorry I only know 6 & 7 but... 6 is [tex]y=-\frac{2}{3} x-4[/tex] and 7 is the slope is -5 and the y-intercept is (0,3) and the graph is blurry

Step-by-step explanation:

hope this helps sorry if it doesn't have a good rest of your day :) ❤

Answer:35

Step-by-step explanation:

Answer:

T = PV / NR

Step-by-step explanation:

Answer and explanation:

1. In one minute, there would be zero pounds of salt in the bucket because there's 0.25 pounds of salt in one minute and 0.5 gallons of water leaves the bucket in same minute, eliminating the 0.25 pounds of salt.

2. In ten minutes there would be zero pounds of salt because theres 0.25×10= 2.5 pounds of salt and 0.5×10=5 gallons of water would leave the bucket, eliminating the salt.

3. In 60 minutes there would still be zero salt because water leaves the bucket more than salt enters

4. Zero salt too after bucket leaks

5. Zero salt

Answer:

1/2 is greater hope it helps

Answer:

70.028175

Step-by-step explanation:

To convert a radian measurement to a degree measurement, multiply the angle by the conversion ratio.

degrees = radians ×  (57.29578 or 180/pi)

11/9 rad = 70.028175°

Answer:

5. 60%

6. $12,331

Step-by-step explanation:

Cross multiply:

5.

[tex]\frac{137.94}{229.90}=\frac{x}{100}[/tex]

100(137.94)= 13,794

13,794/229.9= 60, 60%

6.

[tex]\frac{616.55}{x}=\frac{5}{100}[/tex]

100(616.55)= 61,655

61,655/5= 12,331, $12,331

I hope this helps!

Answer:

$10 each

Step-by-step explanation:

Answer:

More precisely, the sine of an angle t equals the y-value of the endpoint on the unit circle of an arc of length t.

Step-by-step explanation:

Bunctions, the sine function has an input and an output.

Answer: 7/25

Step-by-step explanation:

To find the sine you divide the opposite side of the angle by the hypotenuse

Answer:

Only student 2

Step-by-step explanation:

Answer: B

Step-by-step explanation: I took the test

Answer:

C. 15

Step-by-step explanation:

The following proportional can be set-up for the figure given:

[tex] \frac{x + 3}{x} = \frac{10 + 2}{10} [/tex]

Solve for x

[tex] \frac{x + 3}{x} = \frac{12}{10} [/tex]

[tex] \frac{x + 3}{x} = \frac{6}{5} [/tex]

Cross multiply

[tex] 5(x + 3) = x(6) [/tex]

[tex] 5x + 15 = 6x [/tex]

15 = 6x - 5x

15 = x

x = 15

Answer: It really dosen't matter if its repeating. If it's repeating just put a line ABOVE THE REPEATING PART. I will explain a little bit so you know what I mean.

Step-by-step explanation: So say you divide 2 by 3 your going to get 0.66666666666. You don't have to put all those 6's. All you have to do is put 0.66 with a line above the two sixes. This will indicate you have a repeating decimal. And this works with any repeating number!

I hope this helps!!!!

Answer:

A.(170+30)-41

Step-by-step explanation:

(170+30)-41=170+(30-41)

200-41=170+(-11)

159=170-11

159=159

Answer:

D. -2/5 + [(-1/5) + 1/4]

Step-by-step explanation:

Hope it helpss :D

Answer:

0.6568 = 65.68% probability that she would be correct.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

45000, 45500, 44500, 46000 and 44000 units. This rate of sales is considered average for the product over the last twenty years or so.

This means that:

[tex]\mu = \frac{45000 + 45500 + 44500 + 46000 + 44000}{5} = 45000[/tex]

Standard deviation of 1500 units.

This means that [tex]\sigma = 1500[/tex]

What is the likelihood that she would be correct if she predicts sales between 43000 and 46000?

This is the pvalue of Z when X = 46000 subtracted by the pvalue of Z when X = 43000. So

X = 46000

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{46000 - 45000}{1500}[/tex]

[tex]Z = 0.67[/tex]

[tex]Z = 0.67[/tex] has a pvalue of 0.7486

X = 43000

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{43000 - 45000}{1500}[/tex]

[tex]Z = -1.33[/tex]

[tex]Z = -1.33[/tex] has a pvalue of 0.0918

0.7486 - 0.0918 = 0.6568

0.6568 = 65.68% probability that she would be correct.

Answer:

81

Step-by-step explanation:

Answer:

81

Step-by-step explanation:

9 in each team and theres 9 teams in all

9*9=81