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Nutka1998 [239]

3 years ago

11

The ratio of boys to girls in Ella's grade is 3 to 4. The ratio of boys to girls in Minh's grade is 4 to 5. Each grade has a tot

al of 20 girls. How many boys are in each grade?

1 answer:

MariettaO [177]3 years ago

5 0

Ella’s grade has 15 boys whilst Minh’s grade has 16 boys - hope this helps!

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nevsk [136]

Answer:

1:4

Step-by-step explanation:

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2 years ago

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Gino used 3/4 of the nails in a box. He has 16 nails left. How many did he use?

BigorU [14]

16/1 *4/3

16*4 then divide that answer by 3.

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2 years ago

4x2 + 8x - 7 - (3x2 - X+9)

Andreas93 [3]

Answer:

<h2> ${x}^{2} + 9x - 16$ </h2>

Step-by-step explanation:

$4 {x}^{2} + 8x - 7 - (3 {x}^{2} - x + 9)$

When there is a (-) in front of an expression in parentheses, change the sign of each term in the expression:

$4 {x}^{2} + 8x - 7 - 3 {x}^{2} + x - 9$

Collect like terms

$4 {x}^{2} - 3 {x}^{2} + 8x + x - 7 - 9$

${x}^{2} + 9x - 7 - 9$

Calculate

${x}^{2} + 9x - 16$

Hope this helps...

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2 years ago

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Find the product of (x – a) and (x - b).

yawa3891 [41]

(x−a)(x−b)

=(x+−a)(x+−b)

=(x)(x)+(x)(−b)+(−a)(x)+(−a)(−b)

=x2−bx−ax+ab

<h2><u><em>=ab−ax−bx+x2</em></u></h2>

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3 years ago

Please answer this question now

soldier1979 [14.2K]

Answer:

6 km

Step-by-step explanation:

You use Pythagoras

${QN}^2 = (PN)^{2}+(PQ)^{2} \\PQ = \sqrt{(QN)^{2}-(PN)^{2} }\\ PQ = 6 km$

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3 years ago