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Blababa [14]
2 years ago
12

Quickly plz 9th grade math ​

Mathematics
2 answers:
kozerog [31]2 years ago
4 0

Answer:

The answer is -8.7

Step-by-step explanation:

-5(-2.1) + 4(-4.8)

10.5 + 4(-4.8)

10.5 + (-19.2) =  -8.7

Rainbow [258]2 years ago
3 0
Im pretty sure its -8.7
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Zarrin [17]
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3 years ago
Derek uses a 136 cm flat steel bar that weighs 4 kg to make rack in the garage. Determine the weight of a 170 cm steel bar
Bumek [7]

The weight of a 170 cm steel bar will be 5 Kg

Step-by-step explanation:

Derek uses a 136 cm flat steel bar that weighs 4 kg to make rack in the garage.

1 kg = 1000 gm

So the weight of 1 cm steel bar will be  \frac{4 }{136} kg

Weight of 1 cm bar = \frac{4000}{136} gm

Let the weight of a 170 cm steel bar will be \frac{4000 }{136} × 170 gm

⇒4000 × 1.25 gm

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3 years ago
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kobusy [5.1K]

Answer: it is the median

Step-by-step explanation:

5 0
1 year ago
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What is the slope intercept of the line y=2x+4
astraxan [27]

Answer:

Slope = 2

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Step-by-step explanation:

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4 0
3 years ago
Emmy throws a doggy toy up in the air. The path of the toy is modeled by the function f(x)=−x^2+4x+5, where x is the number of f
Molodets [167]

Answer:

9feet

Step-by-step explanation:

Given the path of the toy modeled by the function f(x)=−x^2+4x+5, where x is the number of feet the toy is from Emmy and f(x) is the height of the toy.

AT maximum height, the velocity of the toy will be zero. Hence;

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Get the maximum height;

Substitute x = 2 into the given function;

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f(2)=−2^2+4(2)+5

f(2) = -4+8+5

f(2) = 9feet

Hence the maximum height of the toy is 9feet

4 0
3 years ago
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