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GuDViN [60]
3 years ago
11

PLEASE HELP

Mathematics
2 answers:
Alenkinab [10]3 years ago
6 0

Answer:

B. Substitute 9x for y in the first equation

Step-by-step explanation:

There are various ways of solving a system of linear equations:

- Graphing

- Substitution

- Elimination

Here, given that we have two equations that are equal to y in terms of x, we can use substitution and essentially either plug in the expression (7x + 3) in for y in the second equation or plug in the expression (9x) in for y in the first equation.

Look at the answer choices: only B matches, so it's the correct answer.

Olegator [25]3 years ago
3 0

Step-by-step explanation:

<u>Step 1:  Find the most reasonable step</u>

<em>Option A:</em>  It doesn't make sense because that will not help us solve the system of equation.

<em>Option B: </em> This option makes sense because you can then solve for x.

<em>Option C:</em>  It doesn't make sense because that will not help us solve the system of equation.

<em>Option D: </em> It doesn't make sense because that will not help us solve the system of equation.

Answer:  Option B

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schepotkina [342]

Answer:

38,653

Step-by-step explanation:

8 0
2 years ago
I need help with number 7 please, thanks.
kykrilka [37]
B, that’s easy... Just add them up.
8 0
3 years ago
Which fraction is between 1/2 and 2/2
Afina-wow [57]
The fraction between 1/2 and 2/2 is 1/4
5 0
3 years ago
An obtuse triangle has two angles 45 n 18 ,and a third unknown angle theta what's the value of the unknown angle​
zlopas [31]

<u>Answer:</u>

An obtuse triangle has two angles 45 and 18. The value of the unknown angle is 117^{\circ}

<u>Solution:</u>

Given that two angles of an obtuse triangle is 45 and 18.  

Third angle is θ  

We are asked to find the value of third unknown angle theta

According to <em>angle sum property of triangle</em>, sum of three angles of triangle is 180^{\circ}

This means in our case sum of 45, 18 and θ should be 180^{\circ}

\begin{array}{l}{=>45+18+\theta=180} \\ {=>\theta=180-63=117^{\circ}}\end{array}

Hence value of unknown third angle of an obtuse triangle is 117^{\circ}

7 0
3 years ago
Riley is saving up to buy a new television. She needs a total of $968.58. Riley has saved $200.78 already and earns $76.78 per w
attashe74 [19]
968.58=200.78+76.78w
-200.78
767.8=76.78w
/76.78
=10w
Riley must save for 10 weeks
8 0
3 years ago
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