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creativ13 [48]
3 years ago
12

ac{1}{2}b+2\leq -6" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
lesya692 [45]3 years ago
6 0

Answer:

1/2 b ≤-8

Step-by-step explanation:

You might be interested in
What equation results from completing the squre and then factoring x^2+10=15
nlexa [21]

For this case we must complete squares:

x ^ 2 + 10x = 15

We add the square of half the coefficient of the term "x",

(\frac {b} {2a}) ^ 2 on both sides of the equation:

x^2+10x+(\frac {10} {2 (1)}) ^ 2 = 25 + 15\\x ^ 2 + 10x + 5 ^ 2 = 25 + 15

According to the perfect square trinomial we have:

(a + b) ^ 2 = a ^2 + 2ab + b ^ 2

Rewriting the expression we have:

a = x\\b = 5\\(x + 5) ^ 2 = 25 + 15\\(x + 5) ^ 2 = 40

ANswer:

(x + 5) ^ 2 = 40

6 0
3 years ago
To make concrete it take 8 parts crushed gravel, 7 parts water and 5 parts cement mix. A worker needs to make 220 kg of concrete
Romashka-Z-Leto [24]

A complete load of concrete = 8 parts gravel + 7 parts water + 5 parts cement.

Total number of parts in every load = 8 + 7 + 5 = 20 parts

If total load = 220 kg, then       20 parts = 220 kg

Divide each side by  20 :             1 part = 11 kg

gravel   = 8 parts = 8 x 11 kg = <em>88 kg</em>
water    = 7 parts = 7 x 11 kg = <em>77 kg</em>
cement = 5 parts = 5 x 11 kg = <em>55 kg</em>

<u>Check:</u>    88 + 77 + 55 = 220         yay !


4 0
3 years ago
Joyce determines that 30% of her monthly income goes for rent. If her monthly income is $2,009, about how much is her monthly re
bixtya [17]

Answer:

602.7

7,232.4

Step-by-step explanation:

2009 x 0.30 = 602.7

602.7 x 12 = 7232.4

8 0
3 years ago
I need help with this question
faust18 [17]

Answer: it’s B

Step-by-step explanation: Look at the graph clearly

and you will see the value of x and y

3 0
1 year ago
I need help on this, please help explaining how to do this. Thank you &lt;3
Vikentia [17]

Answer:

y=-\frac{1}{4}+5x

Step-by-step explanation:

5x-y=\frac{1}{4}\\-y=\frac{1}{4}-5x\\y=-\frac{1}{4}+5x

6 0
2 years ago
Read 2 more answers
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