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Alex777 [14]
3 years ago
7

5 math questions below

Mathematics
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.

7 0
3 years ago
Read 2 more answers
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

(x + 2) (x - 5)

3x^2 + 5x - 2 when we factorize equals

(3x - 1) (x + 2)

x + 2 is the common term and when we put the 2 on the other side of the equation we get x = -2

4 0
4 years ago
Please help i put max points for u!!
jek_recluse [69]

Answer:

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

21/2 cups of water

Step-by-step explanation:

Plug in 7 as y and 4 as x

7 = 4k

Find k

k = 7/4

Then plug k into th equation

y = 7/4 x

For the second part of the question:

Plug in x which is 6 into the bolded equation.

y = (7/4)(6) = 42/4 = 21/2 (simplified form)

21/2 cups of water

5 0
3 years ago
Read 2 more answers
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:

k = 9/8

y = 9/8x

Step-by-step explanation:

45/40 = 9/8

To check:

40 * 9/8 = 45

Hope this helps!

7 0
3 years ago
16x² -9 = 4ײ + (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 ^ 2from 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}

4 0
4 years ago
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