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3 years ago

7

5 math questions below

2 answers:

11Alexandr11 [23.1K]3 years ago

8 0

The second one is 180

ki77a [65]3 years ago

7 0

1. If we add 115+105 that would equal 220
Now if you subtract 7,654 by 220 we would get 7,420 out hight.

2. What ever you do to one side you to the other.

So 4cm x 4cm x 4cm x 4cm = 16cm now for the triangle there’s to side so 6cm x 6cm = 12cm

Now that we have the total for both shapes we can find the area 12x16= 192cm

0.75 in decimal form.

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Let a and b be rational numbers, and let b be non-zero. Is a/b rational or irrational?

Akimi4 [234]

It actually depends on a.

A might be rational.

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3 years ago

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Х2 – 3x-10<br> 3х2 +5х-2<br> Simplificar la expresión

jenyasd209 [6]

Answer:

x = -2

Step-by-step explanation:

x^2 - 3x - 10 when we factorize equals

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4 years ago

Please help i put max points for u!!

jek_recluse [69]

Answer:

Equation: y = $\frac{7}{4}$ x

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Step-by-step explanation:

Plug in 7 as y and 4 as x

7 = 4k

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Then plug k into th equation

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For the second part of the question:

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21/2 cups of water

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3 years ago

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The variables x and y vary directly. Use the values to find the constant of proportionality, k . Then write an equation that rel

Vaselesa [24]

Answer:

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y = 9/8x

Step-by-step explanation:

45/40 = 9/8

To check:

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Hope this helps!

7 0

3 years ago

16x² -9 = 4×² + (4x²+9)

lesya [120]

For this case we must solve the following equation:

$16x ^ 2-9 = 4x ^ 2 + (4x ^ 2 + 9)$

We remove the parentheses on the right side:

$16x ^ 2-9 = 4x ^ 2 + 4x ^ 2 + 9$

We add similar terms on the right side:

$16x ^ 2-9 = 8x ^ 2 + 9$

We subtract $8x ^ 2$ from both sides of the equation:

$16x ^ 2-8x ^ 2-9 = 9\\8x ^ 2-9 = 9$

We add 9 to both sides of the equation:

$8x ^ 2 = 9 + 9\\8x ^ 2 = 18$

We divide by 8 on both sides of the equation:

$x ^ 2 = \frac {18} {8}\\x ^ 2 = \frac {9} {4}$

We apply square root to both sides of the equation:

$x = \pm \sqrt {\frac {9} {4}}$

We have two roots:

$x_ {1} = \frac {3} {2}\\x_ {2} = - \frac {3} {2}$

Answer:

$x_ {1} = \frac {3} {2}\\x_ {2} = - \frac {3} {2}$

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4 years ago