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zaharov [31]
3 years ago
10

Need to Solve 2x + 3y =19

Mathematics
1 answer:
stira [4]3 years ago
4 0
So this is a coordinate system so put it into y=mx+b format so 3y+2y=19 3y=19-2x Y=(-2x+19)/3 Y=-2/3x+19/3 19/3=6 and 1/3 So y=-2/3x+19/3 Put in values for x and y and get answers exg If you put in 3 For x then Y=-2+19/3 19/3=6 and1/3 -2+6 and 1/3=4 and 1/3 X=3 and y=4 and 1/3 (or 13/3)
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Sarah has 25 coins that are dimes and nickels. Together they total $2.00. How many of each type does she have?
Ivanshal [37]

Answer:

15 dimes and 10 nickels

Step-by-step explanation:

15 dimes because 15 multiplied by 10 cents is $1.50

10 nickels because 10 multiplied by 5 cents is $0.50

15 x 0.10 = 1.50         10 x 0.50 = 0.50

0.50 + 1.50 = 2.00

8 0
3 years ago
Read 2 more answers
In trying to calculate the product of 5 and 12 in her head, Evie first multiplied 5 times 10 and then added the result to the pr
Pie

Answer:

Step-by-step explanation:

distributive

7 0
3 years ago
Y=-2x graphed. had to put more words to put this out
timurjin [86]

Slope-intercept form:

y = mx + b

"m" is the slope, "b" is the y-intercept (the y value when x = 0, or (0,y))


slope=\frac{rise}{run}

Rise is the number of units you go up(+) or down(-)

Run is the number of units you go to the right


y = -2x

This has a y-intercept of 0, so the line intersects the y-axis/goes through the origin at (0,0)

The slope is -2 or \frac{-2}{1}, so from each point, you go down 2 units, and to the right 1 unit.

5 0
3 years ago
If 60% of the registered voters cast 270,000 votes in an election how many registered voters are there. In another election 70%
quester [9]
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3 0
3 years ago
Z varies jointly as x and y. z=60 when x=5 and y=6. find z when x = 7 and y=3
Aneli [31]

Answer:

z = 42

Step-by-step explanation:

The question can be answered in 2 steps as follows:

Step 1: Calculation of the constant of the variation

The equation for the joint variation can be given as follows:

z = cxy ................... (1)

Where;

z = 60

c = constant = ?

x = 5

y = 6

Substituting the values into equation (1) and solve c, we have:

60 = c * 5 * 6

60 = c * 30

c = 60 / 30

c = 2

Step 2: find z when x = 7 and y = 3

Since from Step 1 c = 2, we now use equation (1) and substitute the values into it to find z as follows:

z = 2 * 7 * 3

z = 42

4 0
3 years ago
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