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Mama L [17]
3 years ago
14

Evaluate the expression when x=−3 xˆ2+5x+9

Mathematics
2 answers:
gulaghasi [49]3 years ago
7 0
When -3 is squared it becomes 9 then -3x5 is -15 so put that back into the equation 9-15+9= 4
ololo11 [35]3 years ago
3 0
I'm not sure but I think it's -15
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Describe two different strategies you could use to add 16 + 35 + 24 + 14.​
Vinil7 [7]

Answer:

1. Make a table

2. Combine numbers

Step-by-step explanation:

First what you need to do is make a table making 2 columns, then name them tens and one. Put the tens place in the tens column and put the ones place in the ones column. Then, put all the numbers mentioned (16, 35, 24, 14) in the table and add the tens then add the ones!

Another strategy you can use is combining numbers. With 35 and 16 you can combine them to make 51. Then combine 24 and 14 to make 38. Then you add 51 and 38 to get 89.

I hope this helped your homework!

7 0
2 years ago
PLEASE HELP!!!!! A satellite telescope has a parabolic dish. Satellite signals are collected at the focal point (focus) of the
-BARSIC- [3]

The dish illustrates operations on a parabola.

The depth of the parabolish dish is 160 feet.

The bowl is said to be a parabola.

So, we have:

\mathbf{(x -h)^2 = 4p(y - k)}

Where:

\mathbf{Focus: p = 40}

\mathbf{Vertex:(h,k) = (0,0)}

From the question, the diameter is 160 feet.

So, the radius (r) is:

\mathbf{r = \frac{160}{2} = 80}

So, the coordinate of the depth of the parabola would be:

\mathbf{(x,y) = (60 + 100,y)}

\mathbf{(x,y) = (160,y)}

Substitute these values in \mathbf{(x -h)^2 = 4p(y - k)}

So, we have:

\mathbf{(160 - 0)^2 = 4 \times 40 \times (y -0)}

\mathbf{160^2 = 160y}

Divide both sides by 160

\mathbf{160 = y}

Rewrite as:

\mathbf{y = 160 }

Hence, the depth of the parabolish dish is 160 feet.

Read more about parabolas at:

brainly.com/question/4074088

3 0
3 years ago
I NEED HELP PLEASE! :)
dusya [7]

Answer:

Answer choice 1 (904.3 ft^3)

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
At a diner, Hailey’s lunch cost $6.75. Her sister’s lunch cost $5.95. After lunch they each had a frozen yogurt that cost the sa
n200080 [17]
6.75+5.95=12.7
17.40-12.7=5
5÷2= 2.5
Each cost 2.5
8 0
3 years ago
Please help I'm stuck!
frez [133]
I can do A, I think.
Part A: Marina rented a coat at $285 for 3 days. If as rents the same coat for 6 days she has do pay a total rent of $510. <span>Write an equation in the standard form to represent the total rent (y) that Marina has to pay for renting the coat for x days.
</span><span>First, find out the base price. If it was $285 for 3 days, then it's: 285/3, which equals $95 per day to rent the coat. Now you can just write the equation. Use the letters x and y to represent the data they want in the equation. 
y (total rent) = 95x (x being the number of days). So your equation will be y = 95x, and if someone wanted to solve it they'd just need to give the value of "x"</span>
7 0
3 years ago
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