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dimaraw [331]
3 years ago
13

11. 5( y + 3.5) = -7.5 5 2.5​

Mathematics
2 answers:
ioda3 years ago
6 0

Answer:

y=−4.2552

Step-by-step explanation:

Oksi-84 [34.3K]3 years ago
3 0

Answer:

−

4

cot

(

−

45

)

cos

(

390

)

sin

(

330

)

Step-by-step explanation:

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Jackie scored 81 and 87 on her first two quizzes . Write and solve a compound inequality to find the possible values for a third
asambeis [7]

Answer:

The third score must be larger than or equal to 72, and smaller than or equal 87

Step-by-step explanation:

Let's name "x" the third quiz score for which we need to find the values to get the desired average.

Recalling that average grade for three quizzes is the addition of the values on each, divided by the number of quizzes (3), we have the following expression for the average:

average=\frac{81+87+x}{3}

SInce we want this average to be in between 80 and 85, we write the following double inequality using the symbols that include equal sign since we are requested the average to be between 80 and 85 inclusive:

80\leq average\leq 85\\80\leq \frac{81+87+x}{3} \leq 85\\80\leq \frac{168+x}{3} \leq 85

Now we can proceed to solve for the unknown "x" treating each inaquality at a time:

80\leq \frac{168+x}{3}\\3*80\leq 168+x\\240\leq 168+x\\240-168\leq x\\72\leq x

This inequality tells us that the score in the third quiz must be larger than or equal to 72.

Now we study the second inequality to find the other restriction on "x":

\frac{168+x}{3} \leq 85\\168+x\leq 85 *3\\168+x\leq 255\\x\leq 255-168\\x\leq 87

This ine72\leq x} \leq 87quality tells us that the score in the third test must be smaller than or equal to 87 to reach the goal.

Therefore to obtained the requested condition for the average, the third score must be larger than or equal to 72, and smaller than or equal 87:

4 0
3 years ago
The two-way frequency table shows data on accidents in the last year for drivers who took a driver
Galina-37 [17]

Answer:idk help

Step-by-step explanation:

4 0
3 years ago
Please help it’s a practice test
zaharov [31]

slope intercept form is y = mx + b

so the answer is y = 2x - 3

4 0
3 years ago
Read 2 more answers
1) Find the product: 6 x 1/3= * O 61/3 O 6/18 6/3 01/18​
Kamila [148]

Answer:

2

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please help ABC or D multiple choice I’ll give brainly
Vedmedyk [2.9K]

Answer:

B

Step-by-step explanation:

start by multiplying the 6a to each number in the other set of parenthesis.

after doing so, you end up with the numbers: 12a^{2} and -54a

now multiply the one to each number in the other parenthesis. you get this:

2a and -9.

then set it all next to each other: 12a^{2}-54a+2a-9

then combine like terms (-54a and 2a) you get: 12a^{2} -52a-9

so that is how you get B for the answer

4 0
3 years ago
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