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3 years ago

HELP ME!!! I WILL GIVE BRAINIEST!!

Mathematics

1 answer:

blsea [12.9K]3 years ago

8 0

Answer:

the coordinates are 5,-5

sorry if this doesn't help

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−3x+2y=56 −5x−2y=24

Lady_Fox [76]

-3x+2y=56
-5x-2y=24

so first we want to get rid of one variable, in this example we dont need to multiply because the y's cancel out

so we have

-8x=80

x=-10

now plug in x into an original equation

-3(-10)+2y=56
2y=26
y=13

hope that helps

7 0

3 years ago

2. Inflation is at a rate of 7% per year. Evan's favorite bread now costs $1.79. What did it cost 10 years ago? How long

Makovka662 [10]

Answer:

It cost $0.91 10 years ago.

It takes 10.24 years for the cost of bread to double.

Step-by-step explanation:

The equation for the price of bread after t years has the following format:

$P(t) = P(0)(1+r)^{t}$

In which P(0) is the current price, and r is the inflation rate, as a decimal.

If we want to find the price for example, 10 years ago, we find P(-10).

Inflation is at a rate of 7% per year. Evan's favorite bread now costs $1.79.

This means that $r = 0.07, P(0) = 1.79$ . So

$P(t) = P(0)(1+r)^{t}$

$P(t) = 1.79(1+0.07)^{t}$

$P(t) = 1.79(1.07)^{t}$

What did it cost 10 years ago?

$P(-10) = 1.79(1.07)^{-10} = 0.91$

It cost $0.91 10 years ago.

How long before the cost of the bread doubles?

This is t for which P(t) = 2P(0) = 2*1.79. So

$P(t) = 1.79(1.07)^{t}$

$2*1.79 = 1.79(1.07)^{t}$

$(1.07)^{t} = 2$

$\log{(1.07)^{t}} = \log{2}$

$t\log{1.07} = \log{2}$

$t = \frac{\log{2}}{\log{1.07}}$

$t = 10.24$

It takes 10.24 years for the cost of bread to double.

5 0

3 years ago

How to solve polynomials?

liberstina [14]

Factoring:

FOIL (first, outer, inner, last) method

(a+b)(c+d) = 0

ac+ad+bc+bd = 0

Zeros:

(x+a)(x+b) = 0

x+a = 0, x= 0-a

x+b = 0, x= 0-b

4 0

3 years ago

Your regular pay of $67, plus tips, came up to $182.50. How much was the tips?

OLga [1]

The tips were $115.50

4 0

3 years ago

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Find angle in the normal range (0° to 360°, or 0° to 2pi radians) whose terminal side points in the same direction as terminal s

Vaselesa [24]

Answer:

Step-by-step explanation:

An angle of the measure $-\pi /2$ should have the same measure as an angle measured $-\pi /2+2\pi$ because this is periodic. If we do that, we get the angle: $\frac{-\pi }{2} +\frac{4\pi }{2} =\frac{3\pi }{2}$

Thus, the answer is A.

6 0

3 years ago

Read 2 more answers