Hi guys, how to calculate this in system?

{2a+3b=14
{5b+4a=20

Thanks,

Answer: 65.7

Step-by-step explanation:

sinM=

hypotenuse

opposite

​

=

x

60

​

sin

⁡

66

=

60

x

sin66=

x

60

​

x

sin

⁡

66

=

60

xsin66=60

x

sin

⁡

66

sin

⁡

66

=

60

sin

⁡

66

sin66

xsin66

​

=

sin66

60

​

x

=

60

sin

⁡

66

=

65.6782

≈

65.7

feet

x=

sin66

60

​

=65.6782≈65.7 feet

Answer:

67

Step-by-step explanation:

Answer:

4/7

Step-by-step explanation:

Given function:

Cross multiply:

Rename:

Multiply the terms:

Therefore, 2/3·6/7 is 4/7..

Answer:

4/7

Step-by-step explanation:

1. you multiply

2/3 x 6/7 equals 2 x 6 and 3 x 7 equals 12/21

Multiply the denominator and numerator

2. simplify

12/21 equals 4/7

Answer:

A small page can fit 2 photographs, and a large on can fit 2 photographs.

Step-by-step explanation:

Let the number of photographs on the small page be represented by m and that of large one by n.

Since the number of photographs on a page remains constant, then;

4m + 7n = 22 ........... 1

8m + 7n = 30 .......... 2

Multiply equation 1 by 2, and 2 by 1 to have;

8m + 14n = 44 ....... 3

8m + 7n = 30 ......... 4

subtract equation 4 from 3,

7n = 14

n = 2

Substitute the value of n in equation 1

4m + 7(2) = 22

4m + 14 = 22

4m = 8

m = 2

m = 2, n = 2

Therefore, a small page can fit 2 photographs, and a large on can fit 2 photographs so that the number of photographs n a page is constant.

Answer:

52

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

2 x 30 = 60 - 24 = 36 divided by 3 is 12

Answer:

$23.45

Step-by-step explanation:

5.79 x 2.25 = 13.03

5.79 x 1.8 = 10.42

total = 23.45

Answer:

1.67 inches

Step-by-step explanation:

HOPE IT HELPS YOUU

Answer:

8.933,8.96,9.05,9.065,9.08,9.1

Step-by-step explanation:

Answer:

21;13

Step-by-step explanation:

ok so 68/4=17

and length is 4 longer then with so

so length is 17+4 amd with is 17-4

length:21

width:13

Answer:

Step-by-step explanation: How many more points does he need to get to 959

Answer:

57 - 25y

Step-by-step explanation:

when 15 was distributed it should be '45 - 15y' instead of '45 + 15y'

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The correct expression is

12 + 15(3 - y) - 10y

12 + 15 x 3 - 15y - 10y

12 + 45 - 15y - 10y

57 - 20y

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Step 1:

12 + 15(3 - y) - 10y

Step 2:

12 + 15 x 3 - 15y - 10y

Step 3:

12 + 45 - 15y - 10y

Step 4:

57 - 20y

Now,

We see that,

There was an error in step 2 where instead of -15y, +15y was written.

Thus,

The correct expression is

12 + 15(3 - y) - 10y

12 + 15 x 3 - 15y - 10y

12 + 45 - 15y - 10y

57 - 20y

Learn more about expressions here:

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Answer:

A) No Association

Step-by-step explanation:

Your shoe size and your math grade have nothing whatsoever to do with each other, so the answer would be No Association.

Hope it helps!

answer is 65 degree......

Answer:

132/115

= 1 17/115

hope this helps

Answer:

You did not ask a question, but if you need Math help in the future try using the apps I named in the screenshot since Brainly does not allow me to write it.

Step-by-step explanation:

Answer:

m= 13 is corrrect

Step-by-step explanation:

because 13-9=4 so D

Answer:

D.) m=13

Step-by-step explanation:

m-9=4

add nine to both sides then

m=13

Answer:

No DB is not a perpendicular bisector of AC

Step-by-step explanation:

This is because as AC is a straight line it's angle degree is 180 which when bisected by DB becomes,

180 ÷ 2 = 90

On both the angles i.e <BDC = <NDA = 90°

To make it a perpendicular bisector but

<BDC is not equal to <NDA is not equal to 90°.

Hence, DB is not a perpendicular bisector of line AC.

Answer:

40%

Step-by-step explanation:

The first step is to add 18 girls + 12 boys, which gives you the total number of people on the swim team, 30.

Next, you divide the 12 boys by the total swim team members, so:

[tex]\frac{12}{30}[/tex] = 0.4

Then, you multiply 0.4 by 100 to get the percentage:

0.4 × 100 = 40

Therefore, the swim team is made up of 40% boys, and 60% girls.

Answer:

40%

Step-by-step explanation:

30 total kids

12/30 as a decimal is 0.4

to make a decimal into a percent you move the decimal point 2 times to the right

that would be 40

then add the percent to make 40%

Answer:

9:6

Step-by-step explanation:

Answer:

300

Step-by-step explanation:

Answer:

I don't know what you mean by "explain in words", but I'm assuming you were referring to point b.

Step-by-step explanation:

You have to see that the rate of change, the "speed" at which her elevation decreases is 0.25 feet/s, such that in 8 seconds she went down by 2 feet.

Thus, until 50, you just gotta do the calculation for that speed. You notice that she needs to go 30 feet, at a speed of 0.25 feet per second, or 1 foot every 4 seconds.

Answer:

0.625

Step-by-step explanation:

20+12=32 . ( amount of total pupils)

20/32=0.625  

Probability is usually a percentage

Answer:

square,rhombus,parallelogram, and i think thats it

Step-by-step explanation:

There is about 866 possible combinations. (please mark brainiest)

Answer:

10 cm

Step-by-step explanation:

Because it is a parrallogram and by its property it will be 10

Step-by-step explanation:

[tex]f( - \frac{3\pi}{2} ) = 0 \\ f(\pi) = 2 \\ f( \frac{\pi}{2} ) = 0 \\ [/tex]

Answer:

A

Step-by-step explanation:

Equation for a circle of radius r, centered at (h,k):

(x-h)² + (y-k)² = r²

The coordinates of the center and the measure of the radius for a circle given are center = (3,7), radius = √2.

A circle is a shape or a curve in a plane that has a fixed distance, called the radius, from a given point, called the center. A circle is also the set of all points that are equidistant from the center.

Given is an equation of a circle, we need to find coordinates of the center and the measure of the radius for a circle,

The equation of the circle =

(x - 3)² + (y - 7)² = 2

The standard equation for a circle of radius r, centered at (h,k):

(x-h)² + (y-k)² = r²

Comparing both we get,

(h, k) = (3, 7)

r² = 2

r = √2

Hence, the coordinates of the center and the measure of the radius for a circle given are center = (3,7), radius = √2.

Learn more about circle, click;

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