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3 years ago

First use front end rounding to estimate the answer. Then multiply to find the exact answer.

Mathematics

2 answers:

iren2701 [21]3 years ago

4 0

Answer:

Estimated answer = 57.0

Exact answer = 54.04

Step-by-step explanation:

Since 19.3 is lesser than 19.5, it will be rounded down to 19.0

Since 2.8 is greater than 2.5, it will be rounded up to 3.0

Estimated multiplication

19.0 * 3.0 = 57.0

Actual multiplication

19.3 * 2.8 = 54.04

ss7ja [257]3 years ago

3 0

Answer:

Estimate = 57

Exact = 54.04

Step-by-step explanation:

We are given two number which we are to estimate by rounding off by front end and then multiply the exact values.

Front end estimate:

19.3 ---> 19

2.8 ---> 3

19 x 3 = 57

Exact multiplication:

19.3 x 2.8 = 54.04

Using front end rounding, we get an estimate of 57 while multiplying the exact numbers we get 54.04.

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Solve each system of equations X^2+y^2+18x+29=0 X+y=1

tatyana61 [14]

Answer:

two solutions : (-3;4) and (-5;6)

Step-by-step explanation:

hello :

X²+y²+18x+29=0 ..(1)

X+y=1 ...(2)

by (2) : y = 1 - x

put this value in (1) : x² +(1-x)² +18x+29 = 0

x² +1 +x² -2x+18x +29 =0

2x²+16x +30 = 0

x²+8x+15 =0

delta = b²-4ac a=1 b=8 c = 15

delta = (8)²-4(1)(15)=64-60 =4 = 2²

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X2=(-8-2)/2 = - 5

case 1 : x = -3 y = 1 - (-3) = 4

case 2 : x = -5 y = 1 - (-5) = 6

8 0

3 years ago

What is the output, or y-value, when you input x = 1 into the function:

Aleksandr [31]

Answer: $y=-6$

Step-by-step explanation:

By definition, a relation is a function if and only if each input value has one and only one output value.

For this exercise it is important to remember that thw "Input values" are the values of the variable "x"and the "Output values" are the values of the variable"y".

In this case you have the following function provided in the exercise:

$y = x^4 - 2x^3 + x^2 + 4x - 10$

Then, to solve this exercise, you need to follow these steps:

Step 1. You have to substitute $x=1$ into the function given.

Step 2. Finally, you must evaluate in order to find the corresponding output value (or the value of the variable "y")

You get that this is:

$y = (1)^4 - 2(1)^3 + (1)^2 + 4(1) - 10\\\\y=-6$

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3 years ago

Kong took 15\%, percent fewer seconds than Nolan took to complete his multiplication timed test. Kong took 85 seconds. How many

andreev551 [17]

Answer:

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Step-by-step explanation:

multiply 15% by 85 which equals 12.75 then add to 85

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3 years ago

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motikmotik

Answer:

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3 years ago