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3 years ago

Use the substitution method to solve the system of equations. Choose the correct ordered par

Mathematics

1 answer:

Margaret [11]3 years ago

7 0

Answer:

Since ther is an aswer of y,we easily can substitute to the first equation:

x+7=5

x= -2

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It's in the picture ?

nignag [31]

Answer:

Step-by-step explanation:

From first piece -6 < x ≤ 0.

From second piece 0 < x ≤ 4.

Therefore -6 < x ≤ 4 → x ∈ (-6, 4]

-7 ∉ (-6, 4]

-6 ∉ (-6, 4]

4 ∈ (-6, 4]

5 ∉ (-6, 4]

4 0

3 years ago

A^2+10a+24 does anyone know how to do it

Komok [63]

Answer:

(a + 4)(a + 6)

Step-by-step explanation:

f(a) = a² + 10a + 24

I think you are asking us to factor the quadratic.

1. Multiply the leading coefficient and the constant

1 × 24 = 24

2. Find two numbers that multiply to give 24 and add to give 10.

Possible pairs are 1, 24; 2, 12; 3, 8; 4, 6

Start with the numbers near the end of the list.

By trial and error, you will find that 4 and 6 work:

4 × 6 = 24 and 4 + 6 = 10

3. Rewrite 10a as 4a + 6a

a² +4a + 6a +24

4. Factor by grouping the first two and the last two terms

a(a + 4) + 6(a + 4)

5. Distribute the a + 4

(a + 4)(a + 6)

a² + 10a + 24 = (a + 4)(a + 6)

8 0

4 years ago

Help me please I need it

Masteriza [31]

Do 62 minus 3x-1. Whatever you get for that is the answer

4 0

3 years ago

Which one is the correct answer?

xxMikexx [17]

Answer:

Step-by-step explanation: IDK

3 0

4 years ago

Read 2 more answers

pls help for 15 points asap Phil traveled with his family by car. They started their trip from Lexington to Louisville, driving

victus00 [196]

Given that Phil traveled with his family by car. They started their trip from Lexington to Louisville, driving directly west for 60 miles.

So AB=60

They then turned North, driving to Indianapolis which is 100 miles from Lexington.

So AC=100

Then, they turned to the West again, and drove to Decatur which which is 170 straight miles from Louisville.

so BD=170

Now we have to find about how many miles did they cover in total driving from Lexington to Decatur.

That means we have to find length of (AB+BC+CD)

We can use Pythogorean theorem to find the values of BC and CD.

$BC=\sqrt{AC^2-AB^2}=\sqrt{100^2-60^2}=\sqrt{10000-3600}=\sqrt{6400}=80$

$CD=\sqrt{BD^2-BC^2}=\sqrt{170^2-80^2}=\sqrt{28900-6400}=\sqrt{22500}=150$

then (AB+BC+CD)=60+80+150= 290

Hence final answer is miles.

3 0

3 years ago