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2 years ago

I'm new to this Help please ???

Mathematics

1 answer:

Akimi4 [234]2 years ago

4 0

B involves direct variation.

y and x are directly proportional.

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–4.5t49.5t = 40<br> Please help

dlinn [17]

Answer:

t= -0.18

Step-by-step explanation:

Isolate t to get the unknown number:

(-4.5t)(49.5t) = 40

Multiply (-4.5t)(49.5t):

(-4.5t)(49.5t) = -222.75t

Now, write full equation:

-222.75t = 40

Isolate t by dividing -222.75 on both sides:

$\frac{-222.75}{-222.75}t=\frac{40}{-222.75}$

Cancel out left hand side:

$t=\frac{40}{-222.75}$

Simplify your answer:

$t=-0.17957351$

Approximate to 2 decimals:

$t=-0.18$

5 0

2 years ago

each year a tree grows 26 cm. after 4.5 years the tree is 292 cm. how tall was the tree when he moved into the house

jeka57 [31]

26×4=104
292-104=188
26÷2=13
188-13=175cm

the tree was 175cm when he moved in

7 0

3 years ago

HURRY UP PLEASE !!

IRISSAK [1]

Answer:

<h2>The x-interecepts are 5.6 and -1.4, approximately.</h2>

Step-by-step explanation:

The given equation is

$5x^{2} -21x=39$

Where $a=5$ , $b=-21$ and $c=39$ , let's use the quadratic formula

$x_{1,2}=\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a} =\frac{-(-21) (+-)\sqrt{(-21)^{2} -4(5)(-39)} }{2(5)}\\ x_{1,2}=\frac{21(+-)\sqrt{441+780} }{10}=\frac{21(+-35)}{10}\\x_{1}=\frac{21+35}{10}=\frac{56}{10} \approx 5.6\\ x_{2}=\frac{21-35}{10}=\frac{-14}{10} \approx -1.4$

Therefore, the x-interecepts are 5.6 and -1.4, approximately.

7 0

3 years ago

An angle is bisected, forming two new angles. If the original angle had a measure of 14 degrees, what is the measure of each new

s344n2d4d5 [400]

Hello I think the answer would be 7

An angle bisector, bisects an angle into two equal small angles

14 divided by 2 is 7

Hope this helps :)

4 0

2 years ago

HELPPPP 9-12 I'LL GIVE YOU BRAINLIEST!!!

Levart [38]

Answer:

19/20- 0.95; 95%

9/16- 0.5625; 56%

0.4- 2/5; 40%

0.22- 22%; 11/50

Step-by-step explanation:

trust me

5 0

2 years ago