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3 years ago

3x+2y=2 Y=x-9 A) (4,-5) B) (4,13) C) (-5,4) D) (20,11)

1 answer:

4 0

Y = X - 9
so 3X +2Y = 2
will be 3X +2×(X-9) = 2
3X + 2X -18 = 2
5X = 2 + 18
5X = 20
X = 4
Y = X - 9
Y = 4-9
Y = -5
the answer will be A) (4,-5)
please mark me as brainlest

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How do you find the percent error of an estimate and the actual number

suter [353]

Divide the estimated number by the exact number and multiple by 100

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3 years ago

In a group of 50 students 38 play chess and 24 play scrabble. How many plays both chess and scrabble.

Grace [21]

Answer:

Solve:

to solve, first add both partial numbers together

38 + 24 = 62

then subtract the whole number

62 - 50 = 12

Step-by-step explanation:

the way this works is the overflow when adding the two numbers, is the amount of students that do both, they count in both groups meaning their counted twice, this means that if each student dropped a coin for what they played (1 for chess and/or 1 for scrabble) the 12 students who played both would drop two coins

not a professional explanation but i hope it makes sense ^^

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2 years ago

What is the measure of AngleS to the nearest whole degree? 19° 26° 30° 33°

ahrayia [7]

Answer:

A= 33 degrees

A=33°

Step-by-step explanation:

THIS IS THE COMPLETE QUESTION BELOW, ALSO CHECK THE ATTACHMENT FOR THE DIAGRAM

Law of cosines: a2 = b2 + c2 – 2bccos(A) What is the measure of S to the nearest whole degree? 19° 26° 30° 33°

EXPLANATION

Accordingto the law of cosines in

trigonometry, which gives the relationship between the lengths of the sides of a triangle to the cosine of one of its angles.

From the diagram at the attachment, the sides of the triangle are:a=10 ,b=17 ,c=18

The law can is described using the formula below;

a² = b²+ c² – 2*b*c*cos(A)

To get the angle cos(A), we make cos(A) subject of formula

cos(A)=[b²+c²-a²]/[2*b*c]

Then inserting the figures

cos (A)=[17²+18²-10²]/[2*17*18]

cos (A)=0.8382

Then find the inverse of cos(A)

A=arc cos (0.8382)

A=33.05°

A=33°( approximately)

4 0

4 years ago

Read 2 more answers

The number of students who attended FPM in 2015 was 1380. In 2016, 1405 students attended FPM. what was the percent of change in

Fittoniya [83]

The percent of change in student enrollment is 1.81 % increase

Solution:

Given that, The number of students who attended FPM in 2015 was 1380

In 2016, 1405 students attended FPM

To find: Percent change

The percent change is given by formula:

$\text { percent change }=\frac{\text { final value - initial value}}{\text { initial value }} \times 100$

If the result is positive, it is percent increase

If the result is negative, it is percent decrease

From given,

Initial value in 2015 = 1380

Final value in 2016 = 1405

Substituting the values in formula, we get

$\text { percent change }=\frac{1405-1380}{1380} \times 100\\\\\text { percent change }=\frac{25}{1380} \times 100\\\\\text { percent change }= 0.01811 \times 100\\\\\text { percent change }= 1.81$

Thus percent of change in student enrollment is 1.81 % increase

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4 years ago

A sports store sells bicycle baskes at $40.00 for two. Another sports store sells bicycle baskets for $110 for five. Which store

Dennis_Churaev [7]

The first store sells baskets at the better rate because 40.00 divided by 2 is 20.00 dollars for one but 110 dollars divided by 5 is 22 dollars so by going to the first store you are saving 2 dollars.

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3 years ago