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3 years ago

The temperature today was 81F and at night it went down 11F. Which statement is

Mathematics

2 answers:

NikAS [45]3 years ago

8 0

Answer:

the last one is correct 81+(-11)

it would equal 70 degrees F

Georgia [21]3 years ago

8 0

The answer should be -81+(-11)

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What is the gcf for 24 72 36?

maxonik [38]

I hope this helps you

3 0

4 years ago

Cathy has n CDs Gerry has 3 more than twice the number of CDs that cathy has. in terms of n, how many CD does Gerry have?

weqwewe [10]

Answer:

I think this would be 2n+3

Step-by-step explanation:

I learned this in class and I think that since you Gerry has twice the number of CDs (n) + 3, it would be 2n+3. I'm in middle school though, so I don't know if in highschool there's another step, but I hope this helps! :)

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3 years ago

Find the max/min value of f(x) = 2x2 + 3x - 5

Lelechka [254]

Answer:

The minimum value is $(-\frac{3}{4},-\frac{49}{8})$ or $(-0.75,-6.125)$

Step-by-step explanation:

we have

$f(x)=2x^{2}+3x-5$

This is the equation a vertical parabola open upward

The vertex represent a minimum

The general equation in vertex form is

$f(x)=a(x-h)^2+k$

where

(h,k) is the vertex

Convert the given function in vertex form

$f(x)=2x^{2}+3x-5$

Factor 2

$f(x)=2(x^{2}+\frac{3}{2}x)-5$

Complete the square

$f(x)=2(x^{2}+\frac{3}{2}x+\frac{9}{16})-5-\frac{9}{8}$

$f(x)=2(x^{2}+\frac{3}{2}x+\frac{9}{16})-\frac{49}{8}$

Rewrite as perfect squares

$f(x)=2(x+\frac{3}{4})^{2}-\frac{49}{8}$

The vertex is the point $(-\frac{3}{4},-\frac{49}{8})$

8 0

3 years ago

Help me on 12 and 13 please and fast

lys-0071 [83]

Answer:

12. B , 13. 4

Step-by-step explanation:

$12. \frac{3}{12}+\frac{1}{12} +\frac{2}{12} =\frac{6}{12} =\frac{1}{2} \\13. 5-(\frac{2}{10} *5)=4$

3 0

4 years ago

Connor and Angie helped take attendance during their school's practice fire drill. If the actual count was between 77 and 89, in

scoundrel [369]

Answer:

±12

15.8% or 13.5 %

Step-by-step explanation:

Most absolute error would be when actual count was 77 or 89 but number counted was 89 or 77 respectively.

absolute error= 89-77 or 77-89

Percent error= 12/77 × 100 or 12/89× 100

3 0

3 years ago