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juin [17]
3 years ago
11

Bro pls help em bro pls help me bro

Mathematics
1 answer:
mafiozo [28]3 years ago
8 0

Answer:

Step-by-step explanation:

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brittany's first four quiz grades are 78 81 69 and 94 what would her next quiz score need to be in order to have a mean score of
mina [271]
The mean is the sum of all numbers divided by the number of numbers. We can set up an equation:

\sf\dfrac{78+81+69+94+x}{5}=79

Where 'x' is the next quiz score she need. Solve for 'x'. Multiply 5 to both sides:

\sf 78+81+69+94+x=395

Add:

\sf 322+x=395

Subtract 322 to both sides:

\boxed{\sf x=73}

So her next quiz score needs to be 73 in order to have a mean score of 79  on all her quizzes.
7 0
4 years ago
Read 2 more answers
(-2) +32) (-14) + (-7)
Lera25 [3.4K]

Answer:

-457

i think i used a calculator

hope this helps

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Oneta writes an algebraic expression with three terms. The y-term has a coefficient of -3, and the x-term has a coefficient of 1
Snowcat [4.5K]

Answer:

x - 3y + z

Step-by-step explanation:

Terms are just names for objects inside the equation -- anything that isn't an operation. A coefficient the is the number a given term (variable) is being mulitpled by. In this case, -3 for y, and 1 for. x. We can deduce from this the start of the expression (x has no coeff. bc of multiplicative identity)

x - 3y

We know we are missing one term, and we also know that the third term cannot be constant, so it must be another variable. In this case I have chosen Z, in theory it shouldn't really matter but z is the best variable name in this case.

5 0
3 years ago
Can anyone help me solve this.I need proper equation..Thanks​
artcher [175]

Answer:

y = 9\sqrt{2}

Step-by-step explanation:

Using the sine ratio in the right triangle and the exact value

sin45° = \frac{1}{\sqrt{2} }

sin45° = \frac{opposite}{hypotenuse} = \frac{9}{y}

Multiply both sides by y

y × sin45° = 9, that is

y × \frac{1}{\sqrt{2} } = 9

Multiply both sides by \sqrt{2}

y = 9\sqrt{2}

3 0
4 years ago
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Katie wants to buy some popcorn for her family at the theater. Each small tub of popcorn costs $3 and each large tub of popcorn
Molodets [167]

For this case we propose a system of equations:

x: Represents the amount of small popcorn tubs

y: Represents the amount of large popcorn tubs

According to the data we have to:

3x + 4y = 24 (Spending all the money in your wallet)

x + y = 7 (Buying 7 popcorn tubs)

From the second equation we have:

x = 7-y

Substituting in the first equation:

3 (7-y) + 4y = 24\\21-3y + 4y = 24\\21 + y = 24\\y = 24-21\\y = 3

Thus, Katie can buy 3 large tubs of popcorn.

So:

x = 7-3\\x = 4

In addition, you can buy 4 small tubs of popcorn.

Answer:

3 large popcorn tubs.

4 small popcorn tubs.

8 0
3 years ago
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