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4 years ago

Find the value of 3x+2 when 7+ x =5 Please Help me !!

Mathematics

2 answers:

solniwko [45]4 years ago

8 0

X = -2

3(-2) + 2 = -4

Nastasia [14]4 years ago

8 0

7+x=5 would be x= -2. Therefore, if you substitute -2 in for x in 3x+2, you would get -4 as your answer.

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Plssss i need help rn

wariber [46]

Answer:

Step-by-step explanation:

(x₁ , y₁) = (-1 , -2) & (x₂ , y₂) = (3 , 10)

$Slope =\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

$= \frac{10-[-2]}{3-[-1]}\\\\=\frac{10+2}{3+1}\\\\=\frac{12}{4}\\\\=4$

m = 4

y - y₁ = m (x - x₁)

y - [-2] = 4(x - [-1])

y + 2 = 4(x + 1)

y + 2 = 4x + 4

y = 4x + 4 - 2

y = 4x + 2

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3 years ago

Solve the following system of equations using elimination

NARA [144]

Answer:

Well elimination is basically multiplying a number to make it possible for it to cancel out

We can multiply the first equation by 2

2(x+2y=-1)

This would be

2x+4y=-2

Its still the same thing but just with non simplified numbers

We can now do any method really to solve

I will just do the subtraction method

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Solve

2x-2x=0

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-2-4= -6

3y= -6

Now solve

y=-2

To find x subsitute in “y” and find ”x”.

x+2*-2=-1

x-4=-1

x=3

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3 years ago

Grandma's cookie recipe calls for 2/3 cup of sugar, and her cake recipe reqires 3/4 cup of sugar. If she intends to make 2 batch

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She will need 1 1/3 for the cookies. She will need 2 1/4 for the cakes. So she will need 3 1/2 cups of sugar

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Answer:

What's the question?

Step-by-step explanation:

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3 years ago

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Sholpan [36]

<h2><u>Answer with explanation:</u></h2>

Let $\mu$ be the population mean.

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Alternative hypothesis : $\mu$

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Given : n=33 > 30 , so we use z-test.

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i.e. $z=\dfrac{11.2-12}{\dfrac{1.6}{\sqrt{33}}}\approx-2.87$

Using z-value table,

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3 years ago