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3 years ago

SOLVE FASTTT

Mathematics

1 answer:

kherson [118]3 years ago

8 0

Answer:

Step-by-step explanation:

Area of triangle is 40 cm² correct to nearest 5cm² .

∴ Area of triangle = ( 40 ± 5) cm²

∴ upper bound for area of triangle is = (40 + 5) cm² = 45cm²

Base of triangle = 9cm

∵ area of triangle = 1/2 base × height

height = 2 × area of triangle/base

∴ upper bound for height of triangle = 2 × upper bound area/base

= 2 × 45/9 = 10cm

Hence answer is 10cm

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2/5 plus 1/4 plus 7/10

Jobisdone [24]

The answer is 1 7/20

2/5 x 4/4 + 7/10 x 2/2 + 1/4 x 5/5

= 8/20 + 14/20 + 5/20

= 27/20

= 1 7/20

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3 years ago

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The table shows the number of words a

garri49 [273]

B is correct

Total words =105+ 175+315= 595
Total minutes = 3+ 5 + 9 = 17
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3 years ago

I need help on this!!/?

IRISSAK [1]

I think it is 3 but just to make sure check other answerssorry

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3 years ago

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Un boligrafo cuesta 30 ptas mas que un lapiz. Un muchacho ha comprado 8 boligrafos y 15 lapices. En total le han costado 700 pta

Firdavs [7]

Por un sistema de ecuaciones, tiene-se que:

Cada lapiz cuesta 20 ptas.
Cada boligrafo cuesta 50 ptas.

-------------------------

Considera-se un sistema de ecuaciones, con cada boligrafo custando x y cada lapiz custando y.

Boligrafo cuesta 30 mas que un lapiz, o sea, $x = 30 + y$
8 boligrafos y 15 lapices cuesta 700, o sea, $8x + 15y = 700$

-------------------------

Aplicando el primer ecuación en la segunda, tiene-se el cuesto de cada lapiz:

$8x + 15y = 700$

$8(30 + y) + 15y = 700$

$240 + 8y + 15y = 700$

$23y = 460$

$y = \frac{460}{23}$

$y = 20$

Cada lapiz cuesta 20 ptas.

-------------------------

Por fin, el cuesto de cada boligrafo es dado por:

$x = 30 + y = 30 + 20 = 50$

Cada boligrafo cuesta 50 ptas.

Un problema similar es dado en brainly.com/question/24637096

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3 years ago

Brainliest for correct answer, asap please.

jeka57 [31]

Answer:

Not a function

Function

Step-by-step explanation:

The 1st one isn't as clear in the picture, but it looks like the ends of each line overlap the each other.

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3 years ago