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2 years ago

I need help with this please

Mathematics

1 answer:

Thepotemich [5.8K]2 years ago

4 0

Answer:

8. tenths

9. 90,000

Step-by-step:

tenths: ones are 10 times as small and move the decimal point one more time, tenths (note the ths)

90,000 the 9 in 295 is 90. 90*1000=90,000

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Solve the system using the substitution method 3x-y=4 5x+3y=9

rjkz [21]

First solve the first equation for 'y'
3x - y = 4 subtract 3x from both sides
-y = -3x + 4 divide both sides by -1
y = 3x - 4 Now take this equation and substitute into the second equation:

5x + 3y = 9
5x + 3(3x - 4) = 9
5x + 9x - 12 = 9
14x - 12 = 9
14x = 9 + 12
14x = 21
x = $\frac{21}{14} = \frac{3}{2}$ or 1.5
Now substitute this value for 'x' into either of the first two equations to find 'y'
I'll use the equation
y = 3x - 4
y = 3(1.5) - 4
y = 0.5

So your solution is (1.5, 0.5)

5 0

3 years ago

HELP!!! THIS IS DUE AT 11:59!

Misha Larkins [42]

Answer:

1. x = 22

2. x = 38

3. x = 24

Step-by-step explanation:

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3 0

3 years ago

PLEASE HELP ASAP!!! DUE IN SOON!!!

PolarNik [594]

An= -16 + (n-1)7
an= -16 + 7n - 7
an=7n -23

When the rate of change is 7
{a1 = 16, a2=-9, so the rate of rate of change is 7}

5 0

2 years ago

The cost (in dollars) of a custom-made sweatshirt is represented by $3.5n+29.99$ , where $n$ is the number of different colors i

Marina86 [1]

Answer:

$Cost = 52.5n + 449.85$

Step-by-step explanation:

Given

$Cost = 3.5n + 29.99$

Required

Determine cost of 15

$Cost = 3.5n + 29.99$

The cost of 15 sweatshirts is calculated by multiplying the cost of 1 by 15.

So, we have:

$Cost = (3.5n + 29.99) * 15$

Open Brackets

$Cost = 3.5n * 15 + 29.99 * 15$

$Cost = 52.5n + 449.85$

Hence, the simplified cost of 15 sweatshirts is

$Cost = 52.5n + 449.85$

3 0

3 years ago

Find the distance from point (-1, 3) to the line 5 x - 4 y = 10.

Wewaii [24]

We could use the formula, derive the formula, or just work it out for this case. Let's do the latter.

The distance of a point to a line is the length of the perpendicular from the line to the point.

So we need the perpendicular to 5x-4y=10 through (-1,3). To get the perpendicular family we swap x and y coefficients, negating one. We get the constant straightforwardly from the point we're going through:

4x + 5y = 4(-1)+5(3) = 11

Those lines meet at the foot of the perpendicular, which is what we're after.

4x + 5y = 11

5 x - 4y = 10

We eliminate y by multiplying the first by four, the second by five and adding.

16x + 20y = 44

25x - 20y = 50

41x = 94

x = 94/41

y = (11 - 4x)/5 = 15/41

We want the distance from (-1,3) to (94/41,15/41)

$d = \sqrt{ (-1 - 94/41)^2 + (3 - 15/41)^2 } = \dfrac{27}{\sqrt{41}}$

8 0

4 years ago