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melomori [17]
3 years ago
15

What addition doubles fact can help you solve 4 +5?

Mathematics
2 answers:
DENIUS [597]3 years ago
6 0
4+4= 8 + 1=9
2+2=4 + 5=9
goldfiish [28.3K]3 years ago
4 0
4 + 4 can help. Then add one.
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Answer:

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Step-by-step explanation:

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3 years ago
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the rectangle shown has a perimeter of 40cm and the given area of 64 cm squared it's length is 8 more than twice its width write
notka56 [123]

Answer:

16 = l

4 = w

Step-by-step explanation:

{64 = wl

{40 = 2w + 2l

{l = 8 + 2w

64 = w[8 + 2w] ↷

-64 + 8w + 2w² ↷

[2w² - 8w] + [16w - 64]

2w[w - 4] 16[w - 4]

[w - 4][2w + 16] = 0

↑

This is the expression we want because when we talk about dimensions, we want NON-NEGATIVE numbers. The other expression results in -8 = w, and we do not want that; this expression gives us a solution of 4 = w, and THIS is exactly what we want. Anyway, you plug "4" back into the system of equations and you will get a length of 16 centimetres.

I am joyous to assist you anytime.

7 0
3 years ago
How many combinations of pennies (1 cent), nickels (5 cents) and/or dimes (10 cents) are there with a total value of 25 cents?
Dmitriy789 [7]
Hello ,
there are 12 combinations

 num           x             y             z
 1             0             1             2
 2             0             3             1
 3             0             5             0
 4             5             0             2
 5             5             2             1
 6             5             4             0
 7             10            1             1
 8             10            3             0
 9             15            0             1
 10            15            2             0
 11            20            1             0
 12            25            0             0

 



DIM x AS INTEGER, y AS INTEGER, z AS INTEGER, k AS INTEGER
'OPEN "c:\nosdevoirs\monnaie.sol" FOR OUTPUT AS #1
k = 0
FOR x = 0 TO 25
    FOR y = 0 TO 5
        FOR z = 0 TO 3
            IF x + 5 * y + 10 * z = 25 THEN
                k = k + 1
                PRINT k, x, y, z
'                PRINT #1, k, x, y, z

            END IF
        NEXT z
    NEXT y
NEXT x
'CLOSE #1
END


7 0
3 years ago
DnakahbVDSJwaafjisghdkj
Leya [2.2K]

Answer:

Step-by-step explanation:

8 0
3 years ago
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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B3%7D%20%20%3D%20%20%5Cfrac%7Bx%7D%7B6%7D%20" id="TexFormula1" title=" \fra
timurjin [86]

\bf \cfrac{4}{3}=\cfrac{x}{6}\implies \stackrel{\textit{cross-multiplying}}{(6)4=(3)x}\implies 24=3x\implies \cfrac{24}{3}=x\implies 8=x

5 0
4 years ago
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