Answer:
Step-by-step explanation:
170 + 238 =408
572 + 279 =851
395 + 123 =518
628 + 229 =857
A negative number * another negative number gives a positive value
A positive number * another positive number also gives a positive value
The solutions are -4, 4
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Answer:
x= -0.62 or -5.38
Step-by-step explanation:
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Answer:
a=5
Step-by-step explanation:
1. Multiply 4 and 6a by 4.
You'll get 24a + 16.
2. Subtract 16 from 136.
You'll get 120.
3. Divide 120 by 24 to get <em>a</em> by itself.
=a
a=5
Answer:
111 girls
Step-by-step explanation:
Given
Boys: Every 17 outdoor ≈ 20 indoor
Girls: 3:2 outdoor to indoor
First, we'll determine the ratio of outdoor to indoor for boys;
Recall that;
17 choose indoor while 20 choose outdoor;
The ratio of outdoor to indoor is;
20 : 17
Convert to fraction:

Let x represent number of boys that choose indoor when 85 boys chose outdoor;
The ratio of outdoor to indoor is;
x : 85
Convert to fraction

Equate both fractions

Multiply both sides by 85





This implies that when 85 chose outdoor, 100 chose indoor for boys;
Total = 100 + 85
Total = 185 boys surveyed
<em>Recall that the question says the same number of boys and girls were surveyed</em>
This implies that
Total Girls Surveyed = 185
For the girl ratio;
Outdoor to Indoor= 3:2
Number of girls that chose outdoor is as follows;





<em>Hence, the number of girls that chose outdoor is 111</em>