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3 years ago

??? Anyone need help

Mathematics

1 answer:

Anestetic [448]3 years ago

3 0

Answer:

6) -3

7) 32

8) -6.5

Step-by-step explanation:

6) -2 -1 = -3 You add because they are both negatives.

7) You multiply both and it becomes a positive because they are both negatives.

8) -13 ÷ 2 = -6.5

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Identify the interval(s) on which the function y = x^2-3x-40 is positive

MakcuM [25]

Answer:

See below

Step-by-step explanation:

x^2-3x-40 Factor

(x - 8) (x + 5)

The x intercepts are -5 and 8

(negative infinity, -5)

(8, positive infinity)

3 0

2 years ago

100×0.23 = <br> 101×0.23 = <br> 102×0.23 = <br> 103×0.23 =

zaharov [31]

Answer:

100×0.23=23

101×0.23=23.23

102×0.23=23.46

103×0.23=23.69

7 0

3 years ago

Read 2 more answers

Using the Law of Cosines, in triangle DEF, if e=18yd, d=10yd, f=22yd, find measurement of angle D

Ivahew [28]

Check the picture below.

$\bf \textit{Law of Cosines}\\ \quad \\
c^2 = {{ a}}^2+{{ b}}^2-(2{{ a}}{{ b}})cos(C)\implies 
c = \sqrt{{{ a}}^2+{{ b}}^2-(2{{ a}}{{ b}})cos(C)}
\\\\\\
\cfrac{{{ a}}^2+{{ b}}^2-c^2}{2{{ a}}{{ b}}}=cos(C)\implies cos^{-1}\left(\cfrac{{{ a}}^2+{{ b}}^2-c^2}{2{{ a}}{{ b}}}\right)=\measuredangle C\\\\
-------------------------------\\\\
\begin{cases}
d=10\\
e=18\\
f=22
\end{cases}\implies cos^{-1}\left(\cfrac{{{ 18}}^2+{{ 22}}^2-10^2}{2(18)(22)}\right)=\measuredangle D$

$\bf \implies cos^{-1}\left(0.893\overline{93}\right)=\measuredangle D\implies 26.63^o\approx \measuredangle D$

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3 years ago

tiff basic insurance cost is $613.50 per year. His insurance company offers a typical "safe-driver discount." What would be his

forsale [732]

The rate if he went three years without an accident based on the information about the insurance is $552.15.

<h3>How to calculate the insurance?</h3>

From the information given, his basic insurance cost is $613.50 per year and his insurance company offers a typical "safe-driver discount.

The amount will be:

= 613.50 - (20.45 × 3)

= 552.15

In conclusion, the rate is $552.15.

Learn more about insurance on:

brainly.com/question/25855858

#SPJ1

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2 years ago

Twice a number is increased by 3 is 7

lys-0071 [83]

7-3=4

4/2=2

The answer is 2